Cheap can be expensive.

I bought a few cheapies off amazon and was snapping bolt all over the place.

I now have a Shimano one (looks very similar to the nashbar one). But even now I hand tighten before using the wrench and then start well below and work my way up the torque settings to be safe.

Long story short: don’t blindly use the torque wrench, if you feel you are over tightening, then you probably are.