Windows 7 displaying file certificate differently on different PCs

I have a file signed more times (once using SHA and once SHA256). My Win7 (x64 Enterprise) however shows only 1 signature. Colleague's Win7 (x64 Ultimate) shows correctly 2 signatures. Does anyone have any idea how to "fix" my OS to correctly display both signatures? Originally I thought my OS may be missing some Win updates but it seems to be up to date (Im behind local WSUS tho so caot be 100% sure). It seems to be a tiny problem but Im often working with this kind of information and this inconsistency forces me to use cmd-line tools instead which is not so comfortable.

Thanks for any hints,

Kra