Steps to replicate the issue (include links if applicable):

• Save articles
• Sort by "recently added"
• The correct default is new > old

• Log in from app
• Enable sync
• Add article from desktop using the official browser extension (may not be needed to reproduce bug, I'm not sure)

• List order now is incorrect (old > new), even if signed out

Also:

• Disable sync and sign out
• Add article
• It goes to the top as expected, but the rest is reversed, so it becomes:
  • new
  • old
  • new

(In bold are the permanently reversed articles that were saved before the sync.)

What happens?:

Signing in on app and syncing reverses saved list order for good

What should have happened instead?:

Order should not have been affected. (New stuff being buried way down is not ideal.)

Software version (skip for WMF-hosted wikis like Wikipedia):

6.9.4

(Appreciate all your efforts.)