charged for troops not created

I used a Retired Bandits item to give me +25 Settlers, and then tried to build 25 Cavalry. However, after clicking the [OK] button, the client side used one of the Settlers to fill an unmanned building, so it decremented me to 24 Settlers as the hour glass was spinning (submitting my request to the server side). After a few minutes of waiting (went and brushed my teeth), I came back to find that it was still spinning, no Cavalry had been queued, but I had been charged the full amount of resources to build them. I was able to then build 24 Cavalry normally, and charged additional resources.

Yes, I have had the same thing happen. Luckily for me it was with Recruits once or twice and not Cavs. This has also happened to me in the Provisions House.