If you have "update tags when file info changes" switched on and make multiple changes to the same file/track, before you rename it, then you could end up with that many files in the que. But 280 tag changes still in the que for only 11 files does seem a lot!
Having that option switched on can be your best friend if you only edit 1 or 2 fields/tags per track but it can be your worst enemy if you end up editing more tags/fields per track or album.
Sorry but there is no way of finding out what files are still in the que.