when claiming server slam rewards it overfilled my inventory and deleted a large amount of the items

when i claimed my rewards for the server slam , i claimed them in order , the first box claimed fine but the 2nd mails box exceeded my available space , filled the vault overflow and then i received many messages stating - itemname - removed.

these items were just gone and not available to be sold or claimed as i suppose they overfilled the overflow? if i had known that could happen beforehand i wouldnt have claimed both until i had sufficient space to deal with them. i did not know the overflow could be exceeded resulting in deleted items