What I have found so far is that they both appear to be an Orconectes.
I have only had them several weeks. They seem to very hardy and active during the daytime.
I am pretty sure they will breed fairly easily. I have several berried females already. Maybe the temp/condition change triggered them breeding. They seem to be pretty well suited for aquarium life and so far they leave the plants alone.
Also when they molt they pile small rocks around them and hide until their shell hardens.