Is pansexuality biphobic?

Samples • media arts major hella bi with a hot guy cat person

I don't know how many of you guys are in the LGBT community or even in the Facebook groups discussing this issue, but it's something that's popped up within the last few days.

Basically, some people are saying that pansexuality, along with poly/omni and the likes, is biphobic because it's implying that bisexuality doesn't include trans folk. According to some sources, bisexuality has never really meant "bi as in two" exclusively. They say that pansexuality (and others) are unnecessary because no one makes the differentiation of trans people with lesbian or gay sexuality.

What are your guy's thoughts on this? I have mine, but am extremely curious about others'. If you're not completely knowledgeable about the subject, feel free to comment anyway, just don't be a jerk about sexuality.