It would be great if there could be an "Are you sure?" note that would come up whenever you are merging anything other than 3 or 5. I have had several accidental merges happen because I place the item where I want it - beside like items - and the second I release they merge together and it ruins my merging of 5. This just happened at the top level of money - and it takes days to get to the top level, so I didn't get my two, I only got one and now I have to start all over again for days. It gets really discouraging when this happens. Thank you for considering this.