As already stated by others, you look alright in that picture, but if you feel it would look more balanced worn lower that is how you should wear it.

I have a similar body-proportion and fitment problem, but in a different area. Because my arms are nearly an inch and a half longer than they should be, plus I'm pretty large around the chest and shoulders with a big butt and thighs--basically I have a gorilla torso and orangutan arms-- I have a heck of a time finding shirts and jackets that actually fit me and an even harder time making clothing look balanced on me. To make everything look right I wear the top of my kilt right at the bottom of my navel and swing my sporran about 1 1/2 to 2 inches lower than most folks, and do a ton of other little tricks to make it look right.