Gee, mine is 30-Jul-1894, guess that make five different dates. Like I said, verified this one in the IGI, which is not a great source. However, you can check the Mormon records at your local history center.
Checking the Mormon database on line, the marriage was entered by:
Elaine Rosenburg 1260 South Elmhurst G-12 Mount Prospect, IL 60056
and is on microfilm 1512638. This may provide some clues.
Better yet, you should write to obtain a copy of the marriage record directly from the church. Give them all possible dates with the name of the couple. I don't have the address handy nor do I know how much they want for to mail a copy (don't forget to send a self address stamped envelope). With a phone call or a little digging, you should be able to find this information. This is the best route to take.