as per the title, this "seems" to have been fixed in the next couple of releases, but will put it here for info in case someone is looking later.
So, what was happening? - well i never got it fully tested enough to narrow it down before the next version came along.
But, basically, when selecting an item from one of the built in search tabs, all would seem ok, albeit a tad slower? (poss connection related) right up until the end, it would look like it's finished, it would repair if required and unrar, just as i have it set to do, but, there'd be one part of the collection stuck at 88% (the times i saw it it looked the same % and usually a PAR2 file) and it would flash up on a server connection line in the download tab like it was connecting, try and then fail to grab the last few % but disappear like it succeeded, but would then reappear and try again.... and it would continue this cycle until i deleted it.
Like i said, it does appear to have stopped doing it, so perhaps fixed in the next couple of minor updates, or maybe it was an issue my end??