We have pt covers here. It's honestly a downgrade from 22.4, hard to believe. All your vacations, days off etc will be at your inside rate of 14 dollars capped at 5 hours a day. You basically have no rights as a pt cover that a full timer has. No 9.5 protections, no roving holidays, you'll have to work holidays, you won't get 1.5x rate for it either. Its a rare position in ups that a few buildings use. Sounds like your hr is lying to you about the pay rate. You'll get the 30, but its after 2 or 4 years depending on your buildings supplement. Once you make full-time, your progression starts over meaning you'll keep your pay rate at 30 but it'll be another 2 or 4 years before you make full time pay.
Depending on your building size, it could be a long while before full time. We have guys waiting 5+ years here, some waited over 10.