Delivery

I've been up since very early and I managed to get a Tesco delivery slot. For the last 6 weeks, all my grocery shopping has been done by giving someone else a list and relying on them adding it to their order or actually going to a shop - being able to do it myself is simply wonderful. Now I have a question. I am an online grocery ordering virgin, I've never felt the need to do it before. Is it normal to have the order page open in the background and to visit it every 30 minutes to add something else?