That was me.
On the 16th of October I deleted every member that not logged onto the site at all in the last 9 months or more. Many had not visited the board for years let alone months.
I posted an announcment about it at the time. The point was to get rid of the people that were obviously not coming back so that the member list is more representative and a lot smaller. 900 old members were deleted.
HOWEVER!
The tool for doing this on the board is crude and as well as those people I wanted to delete it also deleted those members who had joined longer than 9 months ago but who have not been on the site for the 60 days up to that date.
This is something I did not want to do but couldn't avoid with the tool I had and I suspect you fell into that group?
From now on you should be OK as long as you log on at least once a year.
It is a shame that a few got caught out by this and got deleted when I really didn't want to do that. The worst bit is, as you have found, your old posts no longer have your name on them. I am sorry about that.
You can always open a new thread and insert your photos again. I can then insert a link in each thread so that people can jump between the two.