Precisely.

That's the thing, every terminology out there is just some sub-label that combines a personality type with a sexual preference and a gender (and I use the term gender to 100% equal the term sex).

A straight person that doesn't like transgenders is just a transphobic straight person, not a binary-gender subscribing swamp donkey that identifies with the gender they were assigned. Likewise, there is no reason to differentiate between a bisexual and a pansexual based on their capacity to accept transgenders.

The funny thing about it all is that the terms they use are based on "sex" not gender. [Bi][sex]ual. Really, this term was originally used interchangeably with hermaphrodite. A more accurate term for this would be "ambisexual" - ambidexterity is the physical capacity to utilize either hand interchangeably; ambisexuality would be the physical capacity to have attraction to either sex interchangeably. "Bi" on the other hand should mean two, as in having two sexes for bisexuals (hermaphrodite).

Either way, the current context of bisexual acknowledges 2 sexes, and a preferential indifference between the two - the capacity to have an attraction to either. Pansexual as an extension would mean having attraction to all sexes - which again, just means 2, unless you count hermaphrodites. In that sense, it really is 100% synonymous with bisexual. If they wanted to differentiate, they should use some other crap term, like Pangenderual.