Midi merge?

I must be dense today because it is not working for me. The events are on top of each other and I can only select the top one so glue does not work. Happens when I copy an event. Create record one bar, copy it, loop over that copy, record, there are are two events on top of each other. If I try to copy that on only the top layer copies, e.g. Snare no kick. Glue does not work because the bottom layer can be selected.