Building Queue bug

[LaVanil]

built a farm, then wheat field. then built an extra mason, noticed it was not needed, demolished it (still building farm at this point). built a fir woodcutter, noticed it was not needed, demolished it (building wheat field now). want to build a fir wood sawmill, isn't allowing me to, says "your building queue is full". only building in queue at the moment is wheat field (insufficient sources to build, will take a while)

[Nogbad]

Give the server a chance to catch up with all your deleting, or a refresh will normally clear it.

[LaVanil]

yes, a refresh helped, thanks.

[GacekSSJ4]

I got a Bug! Or i'm too stupid to get rid of it.....
Today around 2-3 am I did the following:
- Added 3 buidlings to queue.
- one was near finishmend so I started to cancel building of one of not yet started buildings in queue.
- 1st building finished same time as other one finished deconstruction.
- After that, I had 2 buildings in queue saying that queue is full and all buildings in building menu were inactive.
- To reslve issue(but it did not help), i removed every building from queue, cleared browser cache, shut down browser and from panel I cleared Flash cache, then after starting browser again cleared browser Cache.
- After all that i can add 2 buildings without problem, but if I try to add 3rd one, it shows, but after about 5-10s game refreshes and last building from queue disappears. So theoretically my slot is free in game (on my side) but server denies to add building in queue.
I hereby request your assistance! ( had to say it! sounds so cool :> :D :D)

Edit:
Ok.... I posted it after 4 hours on purpouse so I'm sure bug is permanent... but it disappeard and I can queue again... sick! However, will leave post for your information if you think that something can be done to prevent such things ;P