Could you set them to attach on the opposite side of the head? As I recall the reverse decal options have only about a dozen spaces in use, so you'd be free to expand there.
Thanks! That's really odd behaviour though; surely if the link/model name was incorrect then the site should not allow me to download what appears to be an incomplete file?
I've been having the same problem with LDD being finicky about colours; it does the same thing when trying to paint R2 domes. I'm not seeing changes between opening different sessions though, sorry. :(