Thanks for the reply. I tried your perms but it's still denying me. I verified my group is "Builder" and stuff I add to globalgroups.yml is working as expected. The mods all load, as does the CBbridge plugin. It says it's using VaultPerms and Vault is loaded and working. I am not finding anything wrong in my configuration of it, so I'm scratching my head a little. I guess I'll just switch to OP mode when I want to do MyTown stuff.
Oh also, I tried the "with PEX" version and configured the permissions.yml file, but it didn't work either.