Sorry for the very late reply.

It is indeed very rare but it is possible to get both scrolls in the same shop first try. I can understand your thoughts - sometimes I get attempt after attempt with at least one scroll in the shop (in the first 2 or 3 tries), sometimes I get like 30 attempts and no scrolls in the first minute of trying. The randomness is just like that.

If you want to attempt this game, use these strats (I used them in my latest 19:34 run):

• Save in front of the shop
• Reload and look in the shop until you find at least one of the two scrolls, sell books and take it. Then save in front of the other shop and repeat.
• Use the trigger/exit hotkeys to navigate through screens quickly. I have assigned most keys on the numpad keys and used a tool to change registry(?) and make it so num4 isn't "left arrow" etc. so I can use those keys too.

I will open a new thread to post my exact configuration there.