Can you take Eldritch Heritage in a Bloodline you already have if so what happens?

[Mako Senako]

Let's say I'm a Draconic Bloodline Sorcerer 6/Dragon Disciple 10/Monk (Scaled Fist 4) I picked White Dragon as my bloodline draconic ancestor.

I later pick up Eldritch Heritage (Draconic), Improved and Greater Eldritch Heritage later still, I pick a different Dragon, say Black.

Do I just keep track of my 2nd draconic bloodline powers separately? Is there any overlap? Does the Natural Armor bonus from one supercede the other? The one from the feat seems to treat all my class levels as sorcerer so im guess the natural armor bonus from that one would supercede the White Dragon one.

Would the Dragon Disciple levels only apply to one Bloodline?

[nicholas storm]

Eldritch Heritage
You are descended from a long line of sorcerers, and some
portion of their power f lows in your veins.
Prerequisites: Cha 13, Skill Focus with the class skill
of bloodline selected for this feat (see below), character
level 3rd.
Benefit: Select one sorcerer bloodline. You must have Skill
focus in the class skill that bloodline grants to a sorcerer at
1st level (for example, Heal for the celestial bloodline). This
bloodline cannot be a bloodline you already have. You gain
the f irst-level bloodline power for the selected bloodline.
For purposes of using that power, treat your sorcerer level
as equal to your character level – 2, even if you have levels in
sorcerer. You do not gain any of the other bloodline abilities.

[Mako Senako]

yeah i realized that to late, ugh,