Hello @SkyDancer
The answer to your question is simple and has already been discussed in this topic.
Your forum has been transferred as well as its content on ForumsClub. This includes the messages and members of the original forum. Therefore, the original forum admin account has also been transferred with it and it is this account that can administer the transferred forum and create categories,...etc.
Your account @SkyDancer is a simple member account on the transferred forum and can therefore do nothing, that is normal.
In order to make things easier for you, I have merged your 2 accounts into one global admin account by keeping your account @SkyDancer as the only active account that can administer both forums on ForumsClub.
Hoping it will be clearer for you now.
Regards