Action Performed:
1: Passed a bonfire challenge and changed point total from 55 to 56.
2. Went to profile and click on challenge 3.
3. Marked challenge 3 as completed. - Challenge 3 has already been completed.
4. Saw point total go back to 55 and saw challenge 3 finish date set to 2/23/2015.
Expected Result:
Point total should remain at 56 and challenge 3 finish date should remain at the original date.
Actual Result:
Point total reverted to 55 and challenge 3 finish date set to erroneous date.

Notes
Thankfully, bonfire completion is not reset.

Further detail:
Firefox 35.0.1, Windows 7 32 bit

https://drive.google.com/file/d/0B-94cRSEUQu_OWtObHc4Q3Eyamc/view?usp=sharing
https://drive.google.com/file/d/0B-94cRSEUQu_NjFXQlNySWh0Uzg/view?usp=sharing