Question about the new rrddefinitions.cfg file

I want to be able to handle 5 minutes of data for the rrd files for the entire 288 days. I used the following in the new RC1 definitions file.

    # 576 datapoints w/ 5 minute interval = 48 hours @ 5 min avg.

    RRA:AVERAGE:0.5:1:82944

    # 576 datapoints w/ 6*5 minute averaged = 12 days @ 5 min avg.

    RRA:AVERAGE:0.5:6:82944

    # 576 datapoints w/ 24*5 minute averaged = 48 days @ 5 min avg.

    RRA:AVERAGE:0.5:24:82944

    # 576 datapoints w/ 288*5 minute averaged = 576 days @ 5 min

avg.

    RRA:AVERAGE:0.5:288:82944

After only a couple of days, it looks like I am only getting 20 minute averages on the 48 and 576 day average. Is my calculation wrong? I used 288X24X12 to come up with the 82944. My assumption is that I need that value for all 4 positions.

Thank you,

Tom