<human>: Can you condense the text into three sentences or less?

Where I am employed we have direct deposit bi-weekly. Most of use the company insurance which is automatically taken out of our checks. We all signed contracts that have a solid number on how much we pay for our coverage per month and have half of that taken out of each check. So the full amount is taken each month. The problem is that once or twice a year there are months that have three pay checks. The half amount is taken three times instead of two like it is supposed to.

 I've asked around and of the people that have gotten back to me all have seen the error on their checks just like mine. So I'm going to guess it probably affects everyone that uses the company insurance and/or other auto deduct features on the payroll software.
<bot>: We all signed a contract that states we will pay X amount per month but every once and a while they take to much.