According to a Developer Guarantee you will find in the annual Notice of Meeting that you get in Nov, which sets out dues for the next year to be set in Dec at the annual meeting, dues cannot be raised during the year. The exception is when a special assessment is needed to cover uninsured portions of repair costs to the resort resulting from a major catastrophe such as a hurricane, and you would definitely receive prior notice of any such assessment, which would be applicable to all resort owners. That guarantee also does not apply to property taxes but in the case of property taxes, if they end up being more than (or less than) the estimates made for the year, any such excess (or decrease) is added to (or deducted from) the next year's dues before your monthly payments for that year begin.
Thus, unless you did something like purchase more points, or your resort was significantly destroyed by a natural disaster, the dues you are paying monthly should not change during the year.