I am currently doing Pete's quest. He ask for a and . After purchasing the items, I clicked on finish quest. The page just kept loading. I went to my inventory and notice the two items I had purchased was gone and had given me 2 prizes in place of it. The quest repeated itself 5 times, asking for the same items. On the 5th time I clicked on Finish Quest, and received this message:

I've had this happening a few times lately; not just with Pete. I believe it happened with Carl and the Library too.