Since I already told you that:
- the problem doesn't happen, since I obviously tested it as soon you reported it
- the problem never happened in the almost 10 years GSX has been out
- nobody ever reported it before, as you can see you are the one and only reporting it.
We can safely assume the problem is NOT GSX and, of course, it can't be fixed by reinstalling or uninstalling GSX, since a problem not caused by it cannot obviously fixed by acting on it, but on the thing that is really causing it.
Your latest report, about the heading being "a bit off", not exactly 180 degrees, further confirm it cannot be the possible issue of parking spots linked on both sides, which sometimes can be found in some sceneries but, just a matter of a generic conflict between sceneries, usually caused by traffic products or conflicting products.
Of course, even if the problem is clearly not caused by GSX, I can't say more about what else might be, since you haven't provide any useful information, just a screenshot, which makes impossible to understand what else it might be.
Some things that might have been useful to add to your report would have been:
- The airport used. If it's not default, clearly indicate which scenery you used.
- The AFCAD in use. The GSX parking customization page will tell you the name/path of the AFCAD in use.
- If you used a custom GSX profile you made or downloaded from some place, which might have problems on its own. The GSX parking customization page will tell you the name/path of any GSX custom profiles you are using for this airport. They are NOT removed on reinstalling so, if your profile was wrong before, you can reinstall the whole sim or GSX, it won't change.