The right-click menu says;
"Arrange Icons By >"
Name
Size
Type
Modified
Attributes
----------
Auto Arrange
Align to Grid
....and not;
"Right click
Arrange icons
Align to grid"
The main difference that I can see, being that you have to "Arrange Icons
By" something?! (e.g. Name, Size, etc.,)....
However, one tends to move icons about so that they do not conform to any
automatic criteria sorting.
It is when the icons have been placed in such a unique arrangement that the
problem arises when something like a crash jumbles all the icons up
forgetting your preferred placement of them.
There is no-known cure for this although some have had a go at making
suggestions like mine about re-naming all your icons preceding them with a
number - so if they become "unglued", you can "Arrange Icons By >" Name to
get them back in order.
Then again some would say that the 3rd-party applications written for just
this purpose are the way to go....
Whatever - the desktop icons certainly do not stay put in 99.99999% of
reported cases and, if they did, people wouldn't feel the need to write
bloody applications to sort it out!
It may just be that your preferred arrangement of icons are coincidentally
arranged by "Name" anyway - in which case they wouldn't move, as that's the
default arrangement that they get put back to after a "mishap" !!
Or just maybe you are the 0.00001%...
==
Cheers, Tim Meddick, Peckham, London.