Barbarian rage power

[U Can Dream]

So i am very new to barbarian in pathfinder, so i was wondering if i was 8lvl barbarian could i retrain my rage power i got at 6 & 4 for two 8lvl rage powers.
Also if someone does find the ruling for it please link.
My current dm thinks it lvl locked like spells, so u can only retrain to the same lvl or lower, never higher.

[LordKailas]

Feats and class abilities work differently with the re-training rules. when it comes to class abilities a 3rd level ability can only be replaced with a 3rd level ability or lower. A feat on the other hand be be replaced with another feat that has level requirements you just met.

Retraining: Class Abilities wrote:

Retraining a class feature means you lose the old class feature and gain a new one that you could otherwise qualify for at that point in your level advancement. For example, if you want to retrain your paladin’s fatigued mercy (which she gained at 3rd level), you can replace it only with another mercy from the 3rd-level list. If at 6th level you learned the sickened mercy (which is on the 3rd-level list), you may replace it with a mercy from the 3rd- or 6th-level list (because you are replacing a 6th-level mercy slot which you spent on a 3rd-level mercy).

The class feature you wish to retrain can’t be one that you used as a prerequisite for a feat, class feature, archetype, prestige class, or other ability. You must retrain those elements separately before you can retrain this class feature.

Retraining: Feats wrote:

You may change one feat to another through retraining. Retraining a feat takes 5 days with a character who has the feat you want. The old feat can’t be one you used as a prerequisite for a feat, class feature, archetype, prestige class, or other ability. If the old feat is a bonus feat granted by a class feature, you must replace it with a feat that you could choose using that class feature.

Note that this retraining is unrelated to the fighter ability to learn a new bonus feat in place of an old one at certain class levels. That class ability is free, happens instantly when the character gains an appropriate fighter level, doesn’t require a trainer, and can happen only once for any appropriate fighter level. Retraining a feat requires you to spend gp, takes time, requires a trainer, and can happen as often as you want.

So, if you got a rage power via the feat extra rage power. You could retrain the feat and pick a different rage power that you qualify for now that you didn't when you initially took the feat.

[U Can Dream]

Cool thank you @LordKailas