There is an error in the Minecraft Menu with Forge Version. We have several instances running specific Forge Versions, and they work very well. The issue is that when I log in to each AMP instance, although the Forge Version (in Configuration -> Minecraft) shows properly at first, within 5 seconds the version (drop down) menu automatically switches to the top of the list - which happens to be a vanilla mc version.
This error was happening in 188.8.131.52 and is still happening in 184.108.40.206.
Besides being a display element issue (which it does seem to be), I'm nervous that someone could inadvertently do some thing on this page and the server config will save with the wrong version.
Edit: I made a video to help: