Size-constraints broken

[Ethatron]

When setting size constraints to 1024x1024 some textures don't get re-sized, ex: dragon.dds has a size of 2048x4096, it doesn't get scaled down to 512x1024 it remains 2048x4096. If I set size constraints to 1024x512 dragon.dds gets re-sized as I want it to be at 512x1024, but then all squared textures (ex: 2048x2048) end up being 512x512 when I want them 1024x1024.