Same on PC. I had previously been stuck at 25/26, because of the Starfighter Assault bug registering completed. It reset to 0/26, and now it's at 1/26 after triggering the Starfighter Assault completion.
As a bonus, contacting live support resulted in me getting a two-page long email detailing how to uninstall Origin from my computer, and recommending taking my computer to a professional to get the Operating System registry edited. Not helpful at all, especially when it seems like the problem is stemming from the program itself.
