I'd have thought that amount of honey would be about right for 45 or so litres i.e.3.25lb per imperial gallon for a gravity up to about 1.100, but there's a further 9 litres or 2 gallons of water. So to bring it up to my average amounts it'd need about 5 or 6lb more honey.
Because of the differences in sugar content in honeys, I mix my batches to about 90% of the target volume allowing 3 to 3.5lb honey in the gallon, then blitz like hell, let the foam and bubbles settle then check gravity (i usually start my batches at the 1.100-1.110 area). If its too high its topped with water, or more honey if a bit low.
You'd have to take some of the must out and refridgerate it, if your fermenter is tight for space.
Without a small test lab, mead making can be rather an inexact science.
Just give it another good stirring and retest, with a view to adding more honey if need be......