That is stupid. Was it the correct brand?When I last bought some at the sale(18mos ago) it was every tank from 10 to 55 gallons, EXCEPT the 15gallon. At least here in N.E. WI the 15 wasn't included.
I remember because when I checked out the total cost was off from my guess-timate and the cashier showed me the full price on the 15. The manager said it wasn't an error, the 15 wasn't included.
I didn't get the 15 that day....