Aperture IPTC Core Subject Code Exports Incorrectly to PhotoMechanic
Hello. When using IPTC core Subject Code in Aperture, what I type in exports incorrectly when read by PhotoMechanic Software. It seems to default back to previous Subject Code entries that are invisible on my end using Aperture, and can't be "erased". Anyone else having this problem, and please advise on how to fix this. I have contacted Apple tech support multiple times and they have been unable to resolve this problem.
Aperture 3, OS X Mavericks (10.9.1)