Hi Steph
2nd query first -
The photo problem was part of the upgrade we had back in October 2011 -
Cynric did a video on how to fix the easy ones (ie the one photo that you do have visible on that post).
For the ones which are not showing, I seem to remember the easiest (!) way of sorting them out was to open each photo in turn (having edited the post and gone into 'more options'), save it on your desktop, delete it from the post, then upload each one from desktop again. No way round it, it is a pain in the proverbial. Plenty of yawn time I'm afraid
At least that way the number of stored but not referenced images on the server are kept to a minimum.
Edit to add - Just found that
Cynric also did a video of the not visible thumbnails here.
1st query -
I think you can get most of what you want by using the advanced search function - click in the search box, click on the more button at the bottom of the drop down menu, then select the middle tab 'Search Threads and Posts'. Enter the search term, member name, select the forum and tick the 'Display Results as Threads' option.
I must confess, I don't remember a 'started by this member button' - I'll have a look back through at what I can.
HTH
Steve