Help!

okay so, i had finished watching the 4 seasons of keeping up with the kardashians, and b4 that watching the season 4, i heard of kourtney and khloe take miami show.

kourtney was pregnant right and she gave birth already? so that was like in season 4?

then i watched the kourtney and khloe take miami show. then i was wondering, where is kourtney's baby? why she isn't it with her?

so, which really came first,
keeping up with the kardashians or kourtney and khloe take miami?


thanks in advance