CCSequence and CCSpawn factory methods

Hi all,
I’m very new to the Cocos2D world. So my question could possibly be silly.

I’m using CCSequence and CCSpawn. Why the create factory methods return a CCFiniteTimeAction* while createWithTwoActions returns a CCSequence* (or a CCSpawn*)?

This makes CCSequence hard to use inside CCRepeatForever since CCRepeatForever::create needs a CCActionInterval*.

Thanks in advance,

Flavio