Hi Greenion,
that is an ongoing problem in forums, especially when people fail to post in the correct category

It's not just limited to the banner advertising!
For example, I posted a relatively new program in the "Non-HYIP" a few days ago. I placed it there because no personal investment is involved. The same program is now listed in 2 other categories by another member.
Another well-known forum overcomes this problem by deleting any multiple posts for the same program, and only allowing the original poster to have an affiliate link. Takes a lot of monitoring, and I feel would be against the spirit of this particular forum. The joys of internet marketing

Cheers,
Phil.