I also have this bug, I decided to try an elf city and i logged off for the night, logged back on in the morning many hours later and my buildings had reset to '58 minutes to go' Never had this problem before.
I only get the problem for elf.
In game name : Adam
Every morning orcs like me should have a good long battlecry.. to the tune of.. ahem.. 'WAAAAGGGHHHH!!' It prepares you for the looting and pillaging the day brings.