However you dice it, it's gonna be a sweet mead. BUT, 3.5 lbs of honey in 1 gallon of water should not yield that gravity based on what I'm seeing. It should put you closer to 1.120 (of course, this is without the currants). The currants should up your sugars a little bit but not a ton if they're dehydrated (i.e. the sugars are not fully dissolved into the must yet). Even still, it's like saying the two handfuls of currants added more sugars to your must than the honey (by 2X!!). I'm thinking you got a bad reading; maybe the must is not homogeneous?