Originally Posted by
YadiMolina
The cases are different.
In the link, OP was a British national (i.e. nobody for the U.S.). In this thread, OP is assumed to be a U.S. citizen.
Also - per OP's plan, OP will land in a Mexican airport first (but not TIJ due to CBX) and go through San Ysidro. I don't see how PTY comes into the play here.