Alphabetical sorting of vendors in store list

Hello,

I found an issue with the sorting of vendors in the store list: When I select the sorting from A to Z, the sorting appears to be not using the display name of a shop (store_name). I attached a screenshot taken from the store management interface, because the shops’s order is the same in the front end when sorted alphabetically there. You notice the shop starting with an “s” does not fit in the list at this place.
I can image the shop appears in this place, because the user name of the shop’s admin starts with an “a”.
My question is: What can I do to solve this issue, i.e. to make the list actually being sorted alphabetically?

And directly a second question: Would it be possible to change the default sorting to alphabetical in the store list?

Best regards
Matthias