http://www.minecraftforum.net/forums/mapping-and-modding/minecraft-mods/2178797-dual-hotbars?page=2

Dual Hotbar shifts the food bar up a bit, but the spice of life icons aren't moved as well: http://imgur.com/aqFX6Vu

Thanks for letting me know about this.

See: http://www.minecraftforum.net/forums/mapping-and-modding/minecraft-mods/2178797-dual-hotbars?comment=29

Tested and confirmed that the issue is on Dual Hotbar's end. It is fixed in the 1.6.4 version of Dual Hotbar but the fix didn't make it into the 1.7.10 version.

It should be fixed for all versions in the next Dual Hotbar release.