Sorry to hear of your woes but anyone that knows me knows that I too have and use a G27 wheel.
Other than the left & right / forward & backwards all of my buttons are mapped using Xpadder (genuine bought version) due to GIANTS weird and wonderful native controller/wheel support (or lack thereof)
I would suggest from what I can glean from Upsidedowns post (who also uses a G27 incidentally) is it's Vjoy causing the issue, NOT FreePie, you need to make sure that there is only necessary virtual controller mapping as having unnecessary ones can cause mapping issues within the game.
So before you hit your PC with a sledgehammer to try to fix it I'd suggest looking at the Vjoy settings first**********************************UPDATE*
Weirdly yesterday after setting it all up and playing for most of the night and well into the early hours it all worked fine, as I'd already stated.
Today however was a different story, some how when I started it all up again today (following the exact same startup process as yesterday) it managed to "Bork" my logitech profiler settings too, hnngh ¬_¬
After quite a bit of fiddling about with the various programs I couldn't get the wheel to work correctly again, I was getting roughly 200° rotation (1/4 turn each way) instead of my desired 900° and whatever I tried to adjust it wouldn't change, although none of my buttons were affected which i put down to using Xpadder like previously stated.
But I didn't panic and I didn't re-install Windows or take a sledgehammer to my PC, I just proceeded calmly with the following procedure...
- Uninstall Vjoy using its own uninstaller
- Uninstall FreePie again it has its own uninstaller
- Uninstalled Logitech profiler using Ccleaners uninstall feature
- Registry cleaned (using Ccleaner)
- Re-installed Logitech profiler
As for the issue, others have reported it and said that just re-installing Vjoy & FreePie fixed it but I'm not going to bother with it for now, maybe I'll try it again at a later date or maybe if/when Upsidedown figures why some people are having this issue and he has a proper fix for it.
Sorry for any unnecessary stress caused by my previous recommendation, I could only comment yesterday on how it performed yesterday, that's software and modding for ya