finished garnishment

I was making payments on line and 25.00 a month and one of my payments got return had an issue with my bank it was a online transaction.  I proceeded to pay them the following month 50 for two payments and they sent it back.  Proceeded to sent the motion aside for being 3 months behind.  They did recently garnish my wages and made the last payment this last pay check paid in full just got a letter from stating that I stilled owed them 109.00 but according to the garnishment papers it is paid off.  Can they still collect this?  I have had a garnishment for a medical bill and once it was paid off it was done.  Then they are trying to collect 22.00 for a bounce fee it was electronic payment.  I haven't heard anything as of yet from the court about owing additional fee after the debt is paid.