I am also getting a weird error, I am sure its my install error. I am running this on 1.3.7

On Third Party Mods section not all of the mods are showing up, then I click on it and get that I don't have permission to be there and go to the back to the box selection and it shows up under the Third Party Mods but it also makes everything in that drop down menu repeat so there are two of everything now. Example:

Customers, Orders, ....and then it will repeat again.

Help please,
Thanks