Have you ever received two items when you are pretty sure you only ordered one. I have just unpacked an order and received double what I ordered on two items. Last order it happened on one item.
This is not the first time it has happened and usually I assume that I must have clicked twice by mistake but other times I am as sure as you can be that I only clicked once.
I have also noticed that your orders are amended after you have submitted them. Once I ordered a particular size nappy and recieved the wrong size. The paper receipt reflected what I had ordered but the online order had been changed to what had been sent out to me. Generally I think Ocado are fab but this does annoy me as sometimes the items doubles are expensive and when you live on a budget.