The issue with Battlefield 2 stats not tracking has now been resolved. After the cause was isolated a fix was put into place by the server team earlier this week. Having monitored the situation for the past few days we are now convinced that this was effective in resolving the problem. A smaller issue with Special Forces army play time not tracking was also resolved shortly after it was pointed out to us by community members this week.
We would like to apologise for any frustration caused by both these issues, we hope you enjoy earning your unlocks and ranks now that system is working as intended.