In promo you have two psu member this might be your problem
Not likely, since both target different Primary User Groups and cannot have the same internal id. The mnaming does not matter.
However, the second promotion has a different setting for days registered. Could that be the issue?
On a more general note: I would not change primary usergroups. Just set "Registered Users" with the minimum permission set, then add all additoinal permissions by secondary usergroups (set all permissions to no except what you want to add). This way, you have more control and its easier to keep track of changes.