Thanks for the detailed reply rodovich!
I think something else is at play here.
I'm only ever using one browser at a time (Firefox) and always make sure that only one tab is open.
I definitely am not backing up as far as the original sandbox project, always to the copy I made.
Rarely do I ever see the display "All Changes Saved" as anything else.
I should also mention that I'm using a Mac (El Capitan 10.11.5) with Easel driver version .26
Almost always, changes are not saved when doing what I described above.
One workaround I've found is if I ever have to enter Machine Setup, I'll simply make a copy of the project I'm working on. This seems to save changes flawlessly every time. I don't always remember to do that though, hence my trouble.
Having worked on many platforms on many OS's over the years, the ability to manually save is something I've just gotten used to. Perhaps for peace of mind if nothing else, it would be useful to add this feature in a future update?
Thanks for all your hard work at any rate!