winterizing issue

[DE88ROX]

Trying to winterize my trailer. As you can see in the pic, the in and out valves to water heater are turned off. Bypass valve is turned on.
So why is my water heater filling up with anti-freeze.

This is my 3rd winter with the trailer so I've done it before and had no issues. The white Pex valves in the pic were new last spring. Installed at the dealer because the cheap plastic/brass ones broke.

Any insight into this would be greatly appreciated.

Thanks!

[darsben]

Turn the cold one the other way or will it turn further? The handle may have been installed wrong by the dealer. IT IS A VERY LONG SHOT as I presume the water worked fine all summer