Setting lost on Save Scene / Show???

First quick setup

Avantis with firmware 1.11 we have 14 mixes setup as in-ear-monitors. We use mix fed subs.

Our procedure : Make changes to a specific scene we use everyday (we’re a church). Go to scene, overwrite, Utility, memory, overwrite show, Update, update all to a backup copy of the scene, copy to usb.

What happens on the console: PEQ on main LR high-pass filter resets to an ‘old’ value. Not random value but the same value. Sub PEQ LPF does the same. irritating but I can live with that I just check every time I recall a scene.

The large issue that the in-ear-monitor mixes are reset. This happened between sound check and service today and I thought the singers were going to kill me.

Any suggestions? Is my thought process about saving scene changes wrong? Anyone else?

Thanks Gary