In the rule book downloaded from the website for 2.0. It clearly states the online builder can be found at x-wing.com

I assume someone forgot to point x-wing.com to https://squadbuilder.fantasyflightgames.com

Alternative question, is there no official way to report issues other than a public forum?

I had this question too - X-wing.com is just advertising. It NEEDS to be the squad builder app.

x-wing.com would be MUCH easier for teling people where to go for the official builder.