During a GUI mode compose for x86_64 (on x86_64), a lot of packages are not listed, probably due to x86_64 not being in the arch list.
Fixed in 2.0.5, please confirm and move ticket to 2.1.0 for further analysis during Revisor re-write.
This has been fixed and confirmed fixed
Metadata Update from @kanarip: - Issue set to the milestone: 2.0.5 (EL-5)