Yup. You might try uninstalling your current trailer wiring setup and installing the OEM/factory trailer wiring harness, and doing a hard reboot/reset of your car. If that does not fix it there may have been permanent damage caused to the dash control module or one of the components that feeds it by some anomaly such as a double ground loop, or a wire connected in such a way that it fed power into a wire in the harness that is not supposed to have power.
If you do end up having to replace that dash control module, the new part is close to $800!, without installation, so I'd recommend a used one from a wrecking yard.
My '07 came from the original owner with an aftermarket trailer wiring harness that was installed where she bought the Curt hitch, and the car was used to pull a U-haul trailer 1600 miles. I have not tried to pull a trailer with it, though I might in the future, but it seems to have been done correctly, as I have not seen any glitch or hiccup. You could try taking it back to the folks that installed it and asking them to fix what they did wrong, but the flaw in that concept is that they may not have a clue. Another possible solution might be to find a (hopefully) more knowledgeable installer at a shop that does these installs and see if he can figure it out. Good luck and keep us posted on how this works out. Hopefully it will turn out to be something simple and not priced like brain surgery.
