This happens either with factory presets or my own presets.
Let's say I have created a reverb preset and I've stored it as "Pad2" and it's selected on REV module. When I'm editing the already saved effect, the screen shows "Editing preset: Pad2". If at this moment I press store button, I can overwrite the previously saved module. The expected situation.
Next day I have a rehearsal.
I'm playing and I'm noticing that my reverb needs the mix parameter a little bit higher. As soon as I try to edit the effect, the screen isn't showing that "Editing preset: Pad2", therefore, when I change the mix parameter and try to store it as my "Pad2" preset, I can't. I have to -remember, in the middle of the rehearsal- either save the entire rig, write again the same name -and delete the previous one, because it is possible to have the same name in two different presets (why?), or remember the parameters I changed and their values, load my preset -at this point the editing screen shows up again- and edit it again to be able to overwrite it.
Is this normal? Is something known and it's gonna be solved in future releases? Sorry if it's a known issue, I didn't find any thread.