Trekmaster

I'm editing the part config for a 2-man command pod. I increased its crew capacity to 5. I wanted to be able to see all 5 kerbals while using it, so I decided to add another IVA File onto the part. Unfortunately, instead of using both interiors, it only used one. (The first interior listed to be precise.) Is there any way I can configure the part to use both interiors? Also, could there also be a way to combine the interiors into one. If anyone has any suggestions, please reply. Thank You.