I never brought up bugs (although in my circles we would be allot more strict on cholov stam then a sofek of toiloim) and I'm not trying to mix it up with eiruvin I'm just saying in certain cases a individual will/should choose to be machmir even if it's mihudar according to the cities hashgachah standards, and FYI according to most/all poskim it's preferred be machmir when it comes to cholov stam (similar to what it says regarding eiruvin)
Chazon Ish and Reb Moshe zt"l had valid heterim for CS.(Although now there is a new problem that all CS might be Cholov treifa, but that's a different issue, and a more serious one.)
In your circles they are more machmir on CS, an issur d'rabonon, than tolaim which is 5 lavim
each bug? I can't imagine! And it'snot a sofeik. Lettuce, blueberries, strawberries and many other products start off as muchzak b'tolaim. Especially in this season. (According to the experts there are 6 different types of bugs in and out of the blueberries right now!) Just because you do not know abut it, does not create a sofeik.
If you want to learn more about the bugs, we happen to have one of the biggest tolaim experts locally in GG. Go there and ask him to show you the bugs. Once he points them out to you, your attitude will change.