Nope, clear case of Occam's Razor (
https://en.wikipedia.org/wiki/Occam%27s_razor).
Only 2 real options to this:
Either someone with great technological skills committed multiple federal felonies by remotely hacking into the WSOP system or someone personally infiltrated the WSOP server room, the WSOP's ISP server room or your ISP server room a la Tom Cruise in Mission Impossible all to steal $1,000,000 fake WSOP credits from you.
Gotta be one of those.