I speak as no expert but media and society has made it acceptable for attractive women to be possibly sexually appealing to a woman or a man. Afterall, how many guys say they are turned off by two women kissing versus seeing two men kissing?
You sound heterosexual from your descriptions, even if "hot" women turn you on. You don't mention if you have sexual experience with women...but if not, then perhaps you are following the popular pornography portrayl of what women might be turned on by.
Hexi made a good point, where is the confusion? You know what you like...why think that it is confusing? Afterall, sexual attractiveness is just that...and being gay or straight is not a black or white phenomenon, it is more shades of gray from my understanding. Or perhaps like a scale from 1- 10.