So I recently started playing Molten-WoW (best private server ever btw) and I noticed that when you have buffs, if you log out and then log back in, the timer for the buff will be reset and be at full duration.
So what you do.
1. Buff with any buff.
2. Type /logout
3. Log back in.
4. ????
5. Profit. Your buff should now be at full duration again.