Well I just messed up. KER installed fine but when I installed Docking Port Alignment indicator it made an extra GameData folder, so I pulled the contents out and deleted it, but then CurseForge was saying that KER was messed up now so I reinstalled to fix it and Docking Port Alignment Indicator disappeared off the menu even though it's folder was still in the KSP GameData folder. I launched to see if everything was fine but apparently since I didn't reinstall MechJeb yet, KSP didn't like that and just wiped my entire space station. Anyway, I'm tempted to leave that GameData folder it creates cause it seems like that's the only way it doesn't have problems, but I'm not sure. Maybe they just aren't compatible or something?
I forgot to mention, but with everything they way it is, both KER and Docking seem to be working fine. Here is my current GameData folder:
https://imgur.com/a/yEvV3XG