30 days seems to make more sense than 2 weeks... often one finds upgrades and such for at least 2 weeks after an initial posting.
Doesn't matter really. I personally would not post pics that were done even within the month unless COMPLETELY different quality/size with some adds. (or if nothing shows up in search which happens all too often...)
It didn't matter to me much except for thinking I had to review the rules before reporting things. But I figure it can't be too pleasant for people who post original material, to have them reposted so soon by somebody else.
This particular "repost" was 7-1/2 weeks after the original. (March 8/April 31) ...