Ok firstly, what colour bags did the tso girl put the specials into ?? should have been either green sacks or blue sealable pouches. If she used grey bags that is incorrect. how many bags were tied with the big light blue plastic ties?? and were the bags labelled correctly ? If she wrote 3 x sealed bags on the bill sheet then there should have been 3 green bags with blue ties and proper labels. (or sealed pouches).
Doubt if you would lose your job as nothing got lost, and when the bags turned up at the MC they should have gone on their way thereby no delay of mail.
Get to see your union rep asap and get him in on the interview , most important.
Once I know the answers to those questions it will be easier to suss the situation.
