I think debbiedoo means she is having her monthly loan payment deducted from her savings account and is paying her annual dues in a lump sum with her charge card. (I'm guessing thst she had Disney finance her initial purchase. Some people are able/chose to pay cash for the initial buy in).
Annual dues can either be paid in one lump sum (due in January each year) or they can be paid monthly. If you elect the monthly method, you must allow DVC to directly debit a checking/savings account. If you elect to pay your dues in one lump payment, you can send a check or use a credit card.
If you accept Disney financing (to pay the initial purchase price), it is my understanding that you must allow DVC to directly debit your checking/savings account on a monthly basis. No other option is permitted for the loan.
HTH.