Don't you have a pin continuity tester? You know, like this one.

If you're doing any network wiring yourself, you should own one of these at a bare minimum. This is a simple bare-bones continuity tester but it can show you if you have any pins swapped in situations like this.

In your particular case, you'd temporarily run a known-good long patch cable around the wall from the patch panel to the wall jack area, and test to see whether the wire pins were correct.

There are better cable testers which will check all sorts of great stuff like bandwidth and crosstalk. But they are more expensive. There are ones with remote bounceback modules for long-distance cable testing with a separate device at both ends.