Trading Opportunities Issues

Hello, there!

I've noticed, recently, when searching for a specific card in the "Trading opportunities" feature, it's been pulling up lists of contacts that do not have the listed card.
I've tried a few variants - listing the card without edition or alternative requirements, right down to being as specific as I could.
Still pulls tradelists that are, for some reason, missing the one card I specified.

ALso, I tend to change my filters to search for positive feedback rating 0% or higher - the last few times I've done so, the top few members listed have vanished - which seems strange since the default is 5% or higher, and reducing the requirements shouldn't have any effect on them.

Any ideas? Thanks!

~S~