Propane prices gone awry

OK.
When is the craziness going to stop?
My neighbor got her propane bill from Amerigas in December, and she was charged over $4.00 per gallon.
According to the Energy Information Association (EIA) website, Virginia residential propane prices for the month of December were between $ 2.92 and $ 2.95 per gallon.

So, why did some of the companies around here charge over $4.00 per gallon?

If the information on the EIA website is correct, and the average price of propane in Virginia was 295.2 cents ($2.95) per gallon on December 31, 2007--then it seems to me that a $4.00+ per gallon charge was excessive.
People will not be able to continue to heat their housese if this keeps up.
If anyone else is interested in the cost of propane (and what it should or should not be), the EIA website has a listing of current residential propane prices by state. The website address is:
http://tonto.eia.doe.gov/dnav/pet/pet_pri_wfr_a_EPLLPA_PRS_cpgal_w.htm