Some people simply can't accept that just because they assign a neat little "bisexual" label to their sex with the same sex does not mean the rest of us are going to say "Oh, then you must not be gay because you call it bisexual instead of gay".
Ughhh Yeah No. It's gay. You just can't accept it is all. If you have sex with the same sex you're gay.
If you want to call it bisexual to help you sleep better at night fine but most see it for what it is, homosexuality.