I have solved this problem by renaming all my presets in their various banks by adding incrementing numbers in front of each one eg:
00. Synth Lead, 01. Pad dreams, 02. Bells exploding, etc, this method places any new presets at the end of the Browser list instead of previously slotting in the middle!
I found the quickest and far easiest way of numbering them is by
1, exporting each bank of presets from SMO into a named folder in Files on iPad (making sure the bank name is saved in the preset Attributes)
2, go into these folders and rename each file starting from 00, 01, 02 etc.
3, delete SMO and re-install it.
4, import the newly numbered presets with Browser/settings cog/Import presets, open Files on iPad, select bank folder/select all/open, do this for all banks.
Now every time a new preset is added to a bank the presets will stay in their correct placement order.
Hope this information is useful to others
