US-based, but EU shard/URL for

Hi - I logged into and it is routing me to the EU URLs even though I am based in the US and my hub is in the US. When I install SmartApps, it only works / appears on my mobile app if I install via the EU URL… it does not work if I manually navigate to a US-based URL. Does anyone know how I can correct this so I can integrate with GitHub? I also had an issue where I tried to have someone else join as a member on my home, and it said we were in different regions… I have never lived in the EU… can someone please help?