04-09-2019 11:42 AM - edited 04-09-2019 12:43 PM
Go to the two items you bought, in your Purchase History, what was the postage price there on the olriginal listings on boith items?
Sellers do not have to combine postage. If you wanted that this should have been arranged and agreed before sale. Many sellers [myself included] would pack up stuff before an item sold so as to be able to despatch quickly.
I am not sure if you think that after buying with postage the seller changed to "free postage" [which should be impossible] but - as you have found - free postage = 5*
I foresee the day when all sales are post free