Shared designs with part upgrades

I noticed when I share my designs it only shows the paint and decals. Any part upgrades, such as wing or bumper upgrades are not show in the picture both in my design library and if I buy the car and do a search for the design. However, clearly other cars suggested do show upgraded wing, rim, and such in the pictures. So what’s up, how do I get my upgrades to be part of the design? Though, looks like when you buy a car that has upgrades featured in the pic, it just gets purchased as stock. Still would like to know why the pic doesn’t show it as designed.

See this thread:
http://forums.forza.net/turn10_postst3521_Forza-5---Show-your-body-kit-in-the-design-viewer.aspx