In this example it sounds like the app was making assumptions and pre-segregating matches based on implied attributes rather than specified preferences.

So even though a user might only say "show me matches between 18-35 years old" the app would apply additional filtering based on the user's supplied attributes in an effort to improve "relevance".

I'm not saying you're wrong, or that this was wrong/right but I did want to clarify what the OP seemed to be saying.