I have placed about 5 Proximity Mines about one Huntress's length away from each other. However, when any one of them explodes, all 5 explode at the same time regardless if there was anyone in proximity. This normal? Anything I can do to stop this?

they chain if they are within a certain range, you will have to spread them much further to avoid it i think

Any Similar trap will detonate each other when their range overlaps.

their range is not overlapping. Like i said, they are about one Huntress apart. So how far do they need to be?

Experiment. Set them farther and farther apart until they don't detonate each other.

The outer circle of your second trap cannot touch the smaller circle of the first trap

Like pop said. The outer circle is your effective range, the inner is the triggered range. The effective range can't overlap any of the trigger ranges.

Like i said before, NONE OF THEM WERE EVEN CLOSE TO TOUCHING. No overlap AT ALL. Yet all 5 were going off at the same time.