SimUmp's Win StreaksIf you visit this page there is a panel on the right hand side with a button that says "Rebuild streaks". Press this and it will recalculate your streaks.
Achievement streaks are based on your timezone and the timestamps of your earned achievements.
Make sure your timezone is set correctly on the site and if your streak is unbroken hitting this button will fix them (if for example an achievement scanned to the site later than the day it was earned).
If you do this and think there's still a problem with your streak, please let me know.
Hope that helps.