My Longboard is longer than stated on the stringer

Hi there,
I've had my MacTavish Fireball 9ft 6" board for a couple of years and i'm loving it. But having cleared a new cupboard in my house to store it, I was surprised it did not fit standing upright in a room with a ceiling height of 10ft 6". So when I measured my board from nose to tail, it is more like 11ft 8". I couldn't belive it. I measured some of my other boards and the same thing: my 6ft 6 is more like 7ft 8; the 7ft 2 more like 7ft 10...
What's going on? I thought the measurement was tail to nose, but it seems more like nose to middle fin... Is that normal, as I can't seem to find any info on the web about that????? Perhaps i've been riding a canoe these past two years...
I've had my MacTavish Fireball 9ft 6" board for a couple of years and i'm loving it. But having cleared a new cupboard in my house to store it, I was surprised it did not fit standing upright in a room with a ceiling height of 10ft 6". So when I measured my board from nose to tail, it is more like 11ft 8". I couldn't belive it. I measured some of my other boards and the same thing: my 6ft 6 is more like 7ft 8; the 7ft 2 more like 7ft 10...
What's going on? I thought the measurement was tail to nose, but it seems more like nose to middle fin... Is that normal, as I can't seem to find any info on the web about that????? Perhaps i've been riding a canoe these past two years...