Why do some photos disappear from the data-base?

Does it depend due the “gremlins” during the various posting, and relative adjustements… or what?
For example this picture is still affordable from the comments: http://www.ww2incolor.com/other/a+piedi+nel+deserto+libici.html

but it’s disappeared from his section. Another example is the very rare original pic of the Cant Z 506 flying boat in Polish markings that I posted the last year, more-about, and now it’s disappeared from that section. Why this happens?

I would think it is because the image is already in our database.

I don’t know about the particular photos you mentioned but personally I don’t like images with huge watermarks of other web sites etc.

I re-checked this one: http://www.ww2incolor.com/other/a+piedi+nel+deserto+libici.html
I recall it was in the German Forces album (the default one) and I moved it to the Other Forces album.

I would have to agree! I don’t like to look at images with a watermark across the middle. If it is in the corners, I’d be ok with it.