Adding sounds to new chop program?

Again - old dog learning new tricks.

So, I chopped a sample, converted, and saved slices to new program. I'm coming from older MPCs (2000/4000) where my goal was the k.i.s.s (keep it simple stupid) method - using as few tracks and programs per beat as possible.

Is it not possible to add new sounds to the newly created chop program? When I add and try to play, I get a jumbled mess. I'm assuming this is operator error. Someone help me out. What am I doing wrong?

(Live 2)

you can merge programs in the program menu. or drag the sample to a pad in the program on the sample assign page

Yes please provide more details on what you mean by 'jumbled mess', because all you need to do is manually assign any additional samples to spare pads in the original chop program, either in 'program edit > samples' or via the browser, like you would assign samples to any other program.