Q: i hear a B in the bass, and i think you've included a C natural (is it the minor 9th?)
A: i guess that's what interval it is above the bass, but in a chord symbol you would say 'flat 9', because minor actually refers to the 3rd. so Bmin9 actually means it would have C# and D in it. that's just the way the names work, at least where i'm from