Bit of a bug on the full-screen gallery

In trying to browse this gallery:

http://road.cc/content/image/20570-genesis-equilibrium-tiagra-chainstay-decal

I find that if hit the magnifying glass with the "+" to go full screen, then (in this gallery) it says "image 1 of 138", and the next image it takes you to with the right pointing arrow is image 2, not 36. Makes it hard to get through such a large gallery (but still better than CN, where their galleries appear to be randomly shuffled!)