We intentionally never show your exact location for privacy reasons, and only show the nearest largest town.
Ensure your muzmatch app has Location permissions - to do this tap the Filters and Prefererences button (top left) - or go to
Menu → Filters & Preferences - and grant Location Permissions.
Once done go to DISCOVER and view new profiles - your location should now update using your GPS.
If it is still incorrect - please check your Apple or Android settings and ensure Location is set to HIGH ACCURACY.