Answered through PM but just to recap-my loafers also have a bit of slip but it fits well. I am assuming that some heel slip may be inevitable for this type of loafers.
^I am a bit surprised myself since they are brand new and a popular cut/size which almost never goes on sale at retail stores.
Shoes are pending and further drop on the APC.
Bought the navy trail oxfords and the beefroll loafers from LOST & FOUND in Toronto. Really great store and the owner (jhoo04) is very friendly and knowledgeable. Can't wait to get some Unis Gio chinos from Lost & Found.