Not too long ago the shipped part of the invoice did not exist so what sellers would do ( and I have seen them say this in the "about me" or in the description) is once they shipped then they would leave feedback and say shipped on 2/20/13 (for ex). Also, not all sellers use the lily auction to keep track of their sales, it can be downloaded into another program (or document) so if the seller is keeping track of the paids on their own program then they may not think about or have time to go to the LA also. I know it seems easy to just toggle something, but when you have hundreds and hundreds of orders, payments, etc and track it in your own program then it can be time consuming to go and do it elsewhere.
I just mark mine paid when I PayPal or have the payment in the mailbox so I don't worry about if the seller does this or not.
Now for the feedback, I used to worry about getting my feedback when I was new and needed the number to go up and I had emailed a couple of people that said they do ALL of their feedback for buyers when they are done selling.
