No, creating a shop with the same name as your old one doesn't auto transfer your till collection. Looks like it's time for my third attempt at the till collector achievement or take it as a sign. For what? Not sure. It is frustrating as all hell, though, and not something that can be fixed. Oh yea, staff, I totally had x-amount of SP in my till before I deleted it all. XDD

There should be a button to transfer your till over to your new shop though. If you already deleted the shop there's probably nothing they can do, but they did put in a button to transfer your till to a new shop

you may want to file a ticket, they might be able to look up how much sP you had in your till! if they can't, it was worth a shot :)