Go to sequence edit page and do all the stuff you are trying to do just like cubuse. But you need to break out the manual dude that is necessary!!!!!!
It is easy highlight the region you want in your 2 bar using shift cursor, hit copy to clipboard, move the cursor line to the point you want and hit paste with replace or merge. More than likely you want to use replace. And there you go.
Sequence edit is useful for tracks as the other bars is for the whole sequence.
Now this is moved to newbie section cuz this is very, very basic midi.
P.S. the 4k doesn`t have audio tracks only midi tracks. It is a sampler+midi sequencer.
To get you go the right track download the S5000/S6000 manual to get to grips on the Multis, programs, and matrix it is very insightful and educational. Read the regular 4k manual concerning the midi sequencer as the sampling sections is too contrived.