[SIKSUKR]

BD, If you have water in your tiolet traps, which you do, a plugged vent should have nothing to do with your smell. Your toilets also would not flush properly or would try to pull air in from another fixture on the same line. I would reseat the toilets and while your at it, either get new flange bolts or simply saw off the extra with a hacksaw but not while attached to the toilet. Hold the waste end of the bolt in a vice while sawing off as much is needed. I like to put a nut on first so after sawing through, when removing the nut it cleans up the threads from the saw action. In effect, rethreading the bolt. Bolts are very inexspensive so I would go that route.