If your house is around 58% already you may need to raise the max to 70% or more.
Also, you might want to check that your bath fan exhaust has flaps on the exterior vent? It almost seems like external air is coming back in to keep raising the humidity? Unless someone, like you said took a shower, and then maybe even shut the door or something.
But yeah, I could probably add a setting for a minimum runtime when turned on, so hopefully it will get it dropped down low enough so it wont cycle.
I just saw this earlier today, looks pretty easy to setup.
Or you go the full blown awesome way and setup a database and Granfana
