hello,
this has been discussed some months ago. I think that syndro is talking about the fact that when a OS update is coming out , it has a number of new presets which are added from slot 400 to....depending of the number of new presets.
If you have saved user presets they will jump from there original slot. it's difficult to explain, example:
you have programmed 5 sounds (user presets) and you saved them in slots from 400 to 404. You update your origin, the update contains news presets by arturia sound designers. those will be saved from slot 400 too. so if you want to keep the presets from the upadte you have reload your own sounds elsewhere what may be annoying if you use them in sequence with program changes.
of course you can save the new presets from the update to a new sound bank, reload your own sounds where there were saved and reload the OS update sounds to other slots, but that is really annoying.
I can't find the thread that talked about that a few month ago. but maybe the best solution is to propose the new presets from arturia as a seperate file, instead of put them in the OS update, or made a script in the update that won't overwrite user saved presets slots.