I've noticed this before. Whenever I remove a bigger stash of items from my shop in order to put them somewhere else, they sort of come in one by one. Like I open quickstock on the other shop and only a fraction of the removed items is there. I'm not talking about times when the whole site is laggy.
Yesterday I after a long time decided to recycle (IH Monocles). I wanted to go lenient and only remove a first batch of 3k - 10*300 to turn in. It took like 20 minutes until all of them were in my inventory, well only 2845, actually. I got an error message in my shop also, as well as for the remaining 155 later. First I was pretty shocked, when then - after waiting for 2 minutes anyway - I only found like twohundred in my invy!
Of course I couldn't continue questing, because I had too many items in my inventory - did not want to start turning the items in, because I was afraid I might have lost some and needed to check on the correct amount. Then Recycle Beast was petty slow as well until the 10*300 batches went through.
So after that ordeal I stopped, because I had to deal with the next, BQs, which now force me to stop doing anything else alongside because I need a full screen window to battle and need full attention with finding suddenly checked weapons and scrolls, refreshing on every move and all the what have you.
Essentially, unless I was prepared to spend another couple of hours (and I think 3 o'clock in the morning thanks to all the bugs is late enough), I right now couldn't gain any Recycle Points and lost out on a few thousand yesterday. I used to do them daily for a long time. Fortunately I still have 100k left from way back then, but for people, who have a goal in there it must be extremely tedious to accumulate enough points now!