Not sure if this happens elsewhere but we deduct 4 times each month.Slightly off topic but a pet peeve of mine...
If you are calculating a monthly amount to see what it would be on a weekly paycheck, you would divide by 4.33....not just 4. Financial calculations are based off of a 52 week year, which is more than 4 weeks a month.
So at $17, you should only be paying around $9.82 per paycheck.