With the recent deployment of Showcasing your achievements - how long have you been a member? there is a known issue that affects the following:
- You may not see all members who have gained the appropriate year achievement
- You may not gain the '13 years' achievement, if appropriate to you
The development team are aware of the issue and they're working on a fix. There's presently no timeline for this fix, but any missed achievements can be manually awarded so long as we're made aware of it via 'Report a Problem' in Feedback and Support.