The gasket was changed when i did a preemptive strike on my timing belt before it just randomly goes (123K or so) as well as the water pump and the tensioner pulley. The dealer told me they had to change the gasket while they do this because it had to be replaced.. so i agreed.

The plastic oem coolant thermostat thing by the front of the engine, beside the exhaust outlets split in half, so that was replaced with a new metal one

This re-torquing thing is the first iv heard of that, dealer never told me to come in to get it tightened again, and i cant rely on them for their workmanship if im not watching everything they do. Would it make any difference if i tightened it again, shoved some paper towel around the plugs to soak up the liquid and see if it happens again?