While doing a quest I get the message that I don't have the items even though I know I just bought them. So I check my inventory and the items aren't there, I go back and buy them again, then it says I am not on a quest so I go back to my inventory and there are doubles of the quest items. What is going on?

yeah this has been happening for a very long time. There was a long post about it, staff said it was fixed, so the post was locked.

Eventually it started happening again.

The latest Oh No! You don&;t have all the items required for this quest! You are missing..... on it.

I hope it is fixed soon,no point in doing quests now.

I just had this happen with one of Pete's quests. I don't remember the items he asked for, but I had purchased both and gave them to him. He said that I didn't have the required items, so I went to my inventory. Sure enough, the two items weren't there. So I went back to Pete to see again what he needed, only to find that the quest had somehow been successfully completed and I was able to start a new quest. Meanwhile, I never recieved any items from Pete for completing that quest. I'm not sure if I received an sP reward as I generally don't keep tabs on that.