My servers continue to show up as German servers, but they're hosted from a USA hosting company with a USA IP address.

192.111.155.210 is a USA IP address and can be confirmed by using any number of public IP checkers, except for GameTrackers. I suspect it's because you're using an outdated database that should be updated.

GameTracker updates its GeoIP database periodically. If something is not correct, you have the ability to claim the server and adjust the flag manually.

Yeah I am aware of editing the country flag manually. I also realize it's only a few extra steps, but I've got over 30 servers that need editing/claiming with the wrong country flag. Shutting them all down, changing the server name then entering in the annoying visual captcha multiple times before I get it right to claim the server. Then shutting them all down again and changing them all back to their correct names and restarting them would take a "whole" day if not more.

Seems like a better approach would be to use a more up-to-date geo data file to get more accurate results.