Just noticed my Tenure time on Xbox live with gold went down from 8 to 6 years. The only thing I can think that caused it was letting it lapse for about 4 days a couple of months back when my gold ran out. Otherwise I have been on Gold since early 2007. I even have some content purchased that shows a date of 3/10/2007. It still showed 8 a couple of months ago, but recently changed, not exactly sure when though. I have an Dead or Alive 4 online match achievment unlocked from March 2008, a Guitar Hero online achievment from December 2007, and some from Aegis Wing ones unlocked on June 2007 while playing it coop online when it was released. I could post more, but that is enough to prove I was online in 2007. I recall starting Gold in late 2006 early 2007. I have not let that Gold lapse since then barring the recent renewal one of around 4 days since I forgot it was time to renew. It has been continuous otherwise.
Yet according to Tenure showing right now on my profile I was not online then. I have deleted my profile and re downloaded it and cleared cache to only to have my gamerscore be wrong til I unlocked an achievment but the wrong tenure remains.