Yeah I was surprised by the return visits....
I am so used to overcharging I check the bill - since I give the tip in cash always to make sure the staff actually get it, I also scrutinise the bill.
The only time I raised the issue loudly was when I said to the owner -
No the food is good here. We want to pay for what we ate. We wanna come back !
Oh God and dont the owners love putting the service charge on the card AND pocketing the cash tip ? yup that as well....