Delayne
I am not sure how the original certificate can have less info than the online info unless there are two different certificates and they only sent you one version?
Regardless - are you able to post a scanned copy for us to review? Perhaps others can make out the witnesses names? Does it note who married the couple?
What religion were they? Have you tried to obtain the church records - these records are not the same as the civil records and often contain more info.
Bob