Joe_caithness wrote:let me point a few things out
I have been making music on DAWs for about 10 years so I know what Solo is meant to do 
What I am saying is:
no channels solo'd = plays normally
one channel solo'd = nothing sounds
but what I mean about "cutting everything off" is the sequence or the MIDI data, So it doesn't cut off my bar long loop, but it cuts off everything when that's finished, including the pad selected.
I think this forum is mistaking someone who is having difficulty with a unit which doesn't appear to be working correctly/logically for an idiot!
Joe, man, nobody's mistaking you for an idiot. The unit has different working style paradigm - that of a hardware sampler, which has limitations. MPC has limited ability to provide you with feedback information on what is going on inside it (it has a very small screen, you know). So, what works with a DAW where everything is expected to be intuitive, doesn't work with MPC. Your experience in DAWs actually is what causes trouble with your MPC workflow. What I mean is that you have to know EXACTLY what you want MPC to do, clearly understand principles of its functions and be able to imagine what is going on inside it at every moment when you work with it. And you also have to understand how MPC's sequencer is organized.
As far as I can understand from your rather hectic explanations, your loop is being played as a "One shot" sample (it's because the pad was set to "One shot" playback in the program). So, its playback isn't cut, because the midi event, which triggered the sample, was recorded in the beginning of the bar, and the Solo function doesn't have control over it. If you set the pad (your loop is assigned to) to "Note on" and then record the bar-long note event on the track, the loop will be played back for the duration of the bar, but this time when you solo a track, the loop WILL be cut off because sequencer will switch off note playback for all tracks, except the soloed one. It's the same as, when you press and hold a pad, set to Note on, the sample it triggers is being played back. But when you release this pad, the sample playback stops.
Well, as you didn't bother to explain what were your intentions with the Solo function, I guess I cannot be of any further assistance.