Is your w/ playing at all times? It sounds like that could be the case. The dictaphone metaphor is very useful for w/, if PLAY is engaged but REC is not, the tape will continue to advance. If you ad cue points while this is happening, you can end up with blank loops.
Instead of using REC+LOOP to add a new cue point, try engaging REC then LOOP+down. This will jump to the previous cue point.
Alternatively, with PLAY stopped, you can arm REC, jump to the previous cue and the press PLAY when you want to start recording.
Another option is to split the recording into loops after the initial recording. Record starting at an existing cue or add a new one. Flick UP when you are finished recording, this will add a cue point at the end of your recording and jump back to the previous one while continuing to PLAY.
You can add loop points to the newly recorded loop now by clicking DOWN where you want to add cue points while continuing to move forward through the recording or flick UP to add a cue point and start looping between this and your last most recently added cue.
