I have LOTS of stupid players in my game that makes reckless calls and plays ... BUT when it comes to the mechanics that you are describing they are extremely sharp. It’s not uncommon for my game to have multiple side pots and these guys are able to figure out the math instantly.
I’m so glad to hear of the rustiness. A few years ago I was out of the loop with my group and when I rejoined them I dealt completely backwards (counter clockwise) and had everyone just stare back at me in disbelief.
It is so frustrating trying to play referee for the 2 idiots at the table lol! I played .25/.50 the other night and 2 people kept putting 2x .50 chips in their blind every round which had half of the table thinking it was a small raise smh.
I quadrupled my money so I look back on it very fondly LMAO!!!