Some don't leave feedback until they ship the daylilies. Before Mike added the new features for shipping dates and such to the invoice pages some would leave feedback and say these shipped on such and such date. Sometimes when they are marked paid if a person happens to backspace the page instead of clicking the go to all sold page again it flips the paid back to unpaid or the shipped back to pending (or whatever reason it would flip it back) so it was easier to just leave it in the feedback that it was shipped.
Mark uses another way to keep track of his invoices and what's paid and such so he probably doesn't go back and mark things paid often on the auction and he may do like has been said, wait until he has time to leave lots of feedback at once. I've had others last year that did that and I had wondered about it and that's what they told me, they wait until after all auctions are done and paid and leave feedback all at once.