Having said that, once I've got my hands on a PSR2000 I may find myself computerless with edits to do... so I've had a look at my 'pdf' of the manual. I have to assume the behaviour experienced is a "feature" as the manual shows a multi-bar screenshot and describes editing it, although the general look of the thing suggest my time would be better spent memorizing the words!

Given that the 2000 has this rather posh music display facility, wouldn't it be nice to edit lyrcs in there.....