^Bisexuality and Pansexuality are often caught together a lot, so I understand the confusion. I'm going to try the best of my ability to explain!
Bisexual is the attraction for two (or more) gender identity's, most of the time being cis male and cis female.
Pansexual is the attraction for all genders, and gender identity's, including transgender, intersex, genderqueer, and anything else in the gender spectrum.
People who are bisexual can be trans-phobic, or only be attracted to cis people. While people like myself who are pansexual are really not seen as trans-phobic and can be attracted to any person of their interest.
I hope that makes sense! :3
Just to explain another thing.
Cis - It someone who is comfortable with their gender & sex given at birth. So someone who is transgender would not be cis, or someone who is genderqueer would not be cis, but someone who is male or female would be cis.
I myself am not cis, just for anyone who is curious.