@DawnB - just this renewal, or past renewals as well? Did you have difficulty on an activation?
Credit cards companies can show both Pending and Authorized/Approved charges. Sometimes there are multiple Pending charges showing during activations or renewals, but when the payment gets authorized, the incorrect amounts will fall away, then the real one will stay.
If these end up being Authorized/Approved charges and the extra funds are not showing in your Available funds area, then contact Public Mobile Customer Support Representatives (CSA) by methods posted by @MrSpock
