Sometimes when I enter the US to meet up with friends, I get only a B-1, instead of a B-2 or B-1/B2. I always tell immigration the reason I'm visiting, but some

Sometimes when I enter the US to meet up with friends, I get only a B-1, instead of a B-2 or B-1/B2. I always tell immigration the reason I'm visiting, but sometimes I can tell they aren't listening to a word I'm saying and will just waive me through if they see I already have a valid B-1. I get that my American friends and professional circle are exactly the same.. so in my case it probably doesn't matter; if my circle wasn't the same, would having a B-1 instead of a B-2 be a problem?