Setting up a payroll item with limit for the month

I have two payroll items that I set up both are not doing what I would like them to do.

We pay employees weekly.

First-I have a owner paid health insurance deduction which works great except that I only want it to deduct the full amount one time a month. Under the default rate and limit window, I entered the limit amount and set the type to be monthly. 

Second- I have a child support deduction fee that is to be charge weekly with at a rate of $2.00 but not to be charge more than 2 times in a month. So similar to above, I want it to have a limit of $4.00 set to reset each month. 

Again, everything is working properly for these two items except that I have to go in an delete the items each week that I don't want to charge the amount. I would like to have it so that I don't have to manually enter or delete the amounts. 

Thanks!