Comments: (ArtStudio Pro - iPad)

Brushes Palette:

If my understanding is correct....

I think the "Save" command (which shows after Add Current) should be  "Save as New Group".

Two things are unclear:
"Save" does not refer to Brushes but to Groups;
"Save" does not save the active group - it creates a new, duplicated group, where the only difference is the new brush from "Add Current". (I think this explains how I came to have e.g Basic Modified 1 and Basic Modified 2).
Very confusing.

Also... it is not made clear that we need to change to the intended destination group before we click 'Add Current'.
Probably too complex, but.... Could not "Add Current" be "Save As New Brush" with list of groups then to select destination Group?

iPad version 1.0.10

Please see attached screenshot.

My steps:
4 equal squares.
Wanted to swap top and bottom (to see how pattern aligned).
Moved topleft 4 part down (to still have a grip on it after moving 5 to top)
Moved 5 to top.
Moved 4 to bottom. Layer thumbnail in Palette showed it still at part-way down.
Closed palette, switched and moved other layers: no change to thumbnail.
Closed file.
Re-opened to find thumbnail still at half-way,  but layer content (4) had disappeared. Not hidden under any other layers.
Nothing restored it. Thumbnail remains even after closing, re-opening file.

Can't say if/when AutoSave happened, but at no time had I deleted the Layer 4 anyway.

(Have noticed before Palette thumbnail does not update, but never known layer to disappear).

Hope this of use.

~~~

ALSO (while on the subject) ...
2 Suggestions for Layers...

...Ability to select (Layers Palette) more than one Layer - other than having to make Group, individually move into Group (and then maybe later unGroup).
...In Select Menu, a command to 'Select Layer'  (Active Layer).