If you go straight to the
http://www.slcelections.com/ page, it explains they have a 2 page ballot. Page 2 being voting on laws and constitutional amendments. Some people only vote on page 1. So they do a double count.
Probably as long as they don't go over 200% everything is legit.
Has nothing to do with provisional ballots.
From the web site
Election Summary Report (new)
statement of votes cast (new)
note* - turnout percentages will show over 100% due to a two page ballot. not all voters voted the second card containing the amendments
Does seem a weird way to count