Do you pay your dues monthly with an automatic withdrawl from your bank account?
Are you calculating that based on your automatic January withdrawl, multiplying it by 12? January had a higher than usual payment since it was a catch-up month for underpayment of estimated taxes for last year.
Your February payment will be lower.
Do you have your annual dues statement handy? At the bottom you'll see where it says how much your January payment is, then your Feb-Nov payments, and your final Dec payment.