As other's stated what you paid was correct but there's just confusion over what it was for. Your 2008 points were "free". The $247 is for prorated 2009 AKV points b/c that's already open. You paid for prorated dues from the date of your purcahse to the end of the calendar year - totally unrelated to your UY.
It doesn't sound like you have received the statement for BLT yet which is different from the AKV points since the resort wasn't open when you bought. In the situation of a new resort your dues are the later of opening date or the start of your UY so with a Dec UY you will only have to pay 1/12 of the annual dues. I'd expect you'll receive that bill around the first part of Dec. and it probably won't be due until Jan. sometime. I haven't received a statement yet for our Oct points either but I'll owe for 3 months of dues.
Around the same time as you get the bill for the 2009 BLT dues you'll receive the bill for 2010 dues.
Isn't this all fun and clear as mud?!?!?