primalist bloodrager and barbarian effective barbarian level

[Korthis]

Primalist gets:
"At 4th level and every 4 levels thereafter, a primalist can choose to take either his bloodline power or two barbarian rage powers. If the primalist chooses rage powers, those rage powers can be used in conjunction with his bloodrage, and his bloodrager level acts as his barbarian level when determining the effect of those bloodrage powers and any prerequisites. Any other prerequisites for a rage power must be met before a primalist can choose it. This ability does not count as the rage power class feature for determining feat prerequisites and other requirements."

If you took 4 levels in Primalist and 2 levels in barbarian is your effective barbarian level 6 or do you have an instance of '4 bloodrager barbarian levels' and '2 regular barbarian levels' which are seperate?
I asked this before when I was trying to come up with a spell sundering character and someone said that they don't stack but recently I went over the rules and looked through the relevant data but can't see where that conclusion is coming from. Please site where the answer is coming from either way.

Personally I think it would work because @ 4 his bloodrager levels =4 barbarian levels for prerequisites. Taking two levels in barbarian means he now has 6 barbarian levels as far as prerequisites for rage powers are concerned.

I guess the overall and more general question would be:
If a class (say class A) gives you an effective level in a different class (class B) and then you take levels in that class (class B) do you have the cumulative levels in those classes or two separate instances?

[Bob Bob Bob]

The levels are completely separate. If they're not they'll say something like the animal companion, "The druid's class levels stack with levels of any other classes that are entitled to an animal companion for the purpose of determining the companion's statistics."

You literally bolded the part that says just that, you just have to go back a little farther. "If the primalist chooses rage powers, those rage powers can be used in conjunction with his bloodrage, and his bloodrager level acts as his barbarian level when determining the effect of those bloodrage powers and any prerequisites." Your bolded statement comes with the giant IF that it only applies while the bloodrager is trading out their bloodline power for rage powers (and only applies to the rage powers chosen that way).

[Korthis]

Quote:

You literally bolded the part that says just that, you just have to go back a little farther. "If the primalist chooses rage powers, those rage powers can be used in conjunction with his bloodrage, and his bloodrager level acts as his barbarian level when determining the effect of those bloodrage powers and any prerequisites." Your bolded statement comes with the giant IF that it only applies while the bloodrager is trading out their bloodline power for rage powers (and only applies to the rage powers chosen that way).

Ok, I still don't see it. Say I take the two barbarian levels first then for character levels 3-6 I take primalist bloodrager.

"If the primalist chooses rage powers, those rage powers can be used in conjunction with his bloodrage, and his bloodrager level acts as his barbarian level when determining the effect of those bloodrage powers and any prerequisites."

If I choose rage powers then my primalist levels count as barbarian levels when determing effect and for prerequisites... what am I missing? I have 2 barbarian levels and then I add 4 which equals 6.
Its probably just some weird pathfinder terminology thing where bloodrager barbarian levels aren't actually barbarian levels or some such I just want to read the actual rules that say that it is such.

For instance look at the flurry of blows faq.

Spoiler:

The monk rules for flurry of blows state: "For the purpose of these attacks, the monk's base attack bonus is equal to his monk level." How does this interact with BAB from class levels and racial Hit Dice? Does a multiclassed fighter 19/monk 1 flurry as if his BAB were only +1?

A monk using flurry treats his BAB from monk levels as equal to his monk level. He still adds BAB from other sources (such as other classes or racial Hit Dice) normally to this total.

So a fighter 19/monk 1 has a normal BAB of +19. When he flurries, he treats his monk BAB as +1 (for his 1 level of monk) and still gets BAB +19 from his fighter levels, for a total flurry BAB of +20.

By the way it's written a one level dip in monk would leave you with a BAB of +1 at 20 when flurrying but you add the monk BAB of +1 when to the BAB of other classes even though the ability doesn't say that you do.
The primalist ability essentially says that his barbarian level is equal to his bloodrager level. If you add the monk BAB to non monk BAB using this wording then why wouldn't you add the bloodrager barbarian levels to regular barbarian levels when determining effect/prerequisites for rage powers?

[Bob Bob Bob]

...the bolded part is not what it says. It says "his bloodrager level acts as his barbarian level". That's a full on replacement, not "in addition to" anything else you have.

[Korthis]

by that logic if a fighter 19/ monk 1 uses flurry of blows his BAB is +1 but that isn't the case as per the sited rule so why is it the case in my example?

[Seranov]

It's specifically referring to the Rage Powers Primalist gives you. The overall rule is that "abilities from the Parent and Hybrid class don't stack." In this case, the Primalist calls out that it DOES stack, but only for the purpose of what Rage Powers you can select when you give up Bloodline Powers for them.

[Bob Bob Bob]

Because only the bloodrager levels are counted. Levels do not automatically stack. When picking rage powers you are a level 2 barbarian and a level 4 barbarian (from the bloodrager levels), you are not a level 6 barbarian. If it stacked you would see something like the magus: "Starting at 10th level, a magus counts 1/2 his total magus level as his fighter level for the purpose of qualifying for feats. If he has levels in fighter, these levels stack."

The monk Flurry of Blows FAQ only applies to the monk Flurry of Blows and should not be expanded to include anything else. FAQs answer their specific question and only their specific question. If they're more generic they will be phrased more generally.