Sorry for the late response.
I think this is probably a common mistake, especially on this side of the pond.
We keep our templates folder,design data folder and content centre folder on our vault server machine (on the server but not in Vault).
After about a week of getting up and running with Inventor and Vault (we were using AMDT and windows explorer for file management) I saw that now there were 2 content centre folders on the server.
I only created one of them, the other was created automatically. Our VAR said it was due to discrepancies when naming the folders.
Inventor spells it the American way: content center. When setting up Vault, I used the English spelling: content centre.
It doesn't cause us any problems, it just niggles the hell out of me. Ideally I'd like to rename our library folder in the Vault to the American spelling but I think it could cause untold problems.
I reckon you Yanks should spell 'centre' properly, It would have saved me loads of grief 😉