Hi Mgm,
The maintenance fee (annual) and amenities fee (monthly) are not the same.
TVers pay a non-ad valorem assessment, which is included on our annual property tax bill. Part of that assessment is your bond payment (if any). The other party is for your numbered CDD's operations and maintenance budget.
Here is where you can find more information about it:
http://www.districtgov.org/faq.aspx
You might have to copy and paste the link into your browser.