I'm in the same boat. I have a few shops where the employees think I'm a total boob - or have Alzheimer's.
Month after month, I ask the same questions regarding the same products, and since most retailers have cut employees to skeleton-like crews, I get the same employees.
These particular MSC's don't care - they're just happy the shop is done on time and correctly.
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On a related note, the funniest thing just happened at my local grocery store; my go to store, which I do not shop.
I'm at the checkout and while I'm emptying my cart, two very young cashiers start discussing being shopped, their scores, and their thoughts regarding the shopper.
I couldn't believe they had this conversation right in front of me --
The conversation went something like....I got shopped today, last month she gave me a 10. The 2nd cashier said that she was shopped yesterday, and she too gets 10 from that shopper. They went on to say how dumb it was, that they knew the shoppers, and just work it so they get 10's. According to them, it was easy to spot a shopper.
I swear, it took everything to keep me from asking how they spot a shopper, and which company shops them --
Ironic that I shop every other grocery chain in the area, and have never come across this one --maybe it's for the best, but it would be fun to shop them after over hearing their conversation.