Yep (I'm late, they got it) it's a little strange at first. And Bard gets even weirder.
If you want one power off of a different class, you take the two feats.
One to open the 2nd class including the ppath, one to take the power.
Now you can take one more feat to get one more power ; or one more time after that.
A workable build concept is the Gish:
Wizard with stunlock goodies / multies into Fighter for the level 3 borkny encounter
Ppath into Swordmaster for all the recharges and more combat thingies
EpicD into Deadly Trickster for even more recharges of the dailies.
It's tough enough to make all this work, so your DM doesn't really hafta read the Errata.
It works the same if you hybrid, it's just the 3rd class instead.
What a Bard can do is multiclass on more than one class.
Bard or hybrid Bard or multi Bard can fit in 2 or 3 more class powers.
The wotc CO-board has plenty of these monstahz floating around.
If all this still
seems kinda ...
... you could skip it all
and take Eternal Seeker EpicD. That lets you pick powers off any class.
Although there's a whole 'nother can-o-worms opened by that.