Coins disappearing?

Just had a quick question, just a few minutes ago I had over 20 coins and now I log back on and I have 1 coin. I have no transactions made or anything. What could be the explanation for this?

Very interesting. I too, noticed that my coin coffer was minus 1 coin that I in no way ever spent. I didnt mind though cuz it was a free one. I chalked it up to a glitch, which is not entirely too uncommon in this game, but in truth, I have no idea how it went missing.