Saving loops to a preset

I've posted about this before and never really got a satisfactory answer, so I'm hoping for a better result this time. I want to record loops to a particular preset so I can integrate it into live performance. The problem is that I record a loop, save it to (say) preset 20, which is fine. However, the saved loop is then on every preset, which is completely useless.......
Then, when the loop is erased, it comes back when the VL3 is switched off and back on again. 
Someone suggested saving to a different slot within the loop but this doesn't work either. I want to save maybe 50 different loops to 50 different presets and I'm pulling my hair out trying to find a resolution. Can anyone help? Please ......?