This is what I get on the second sheet sometimes when a bogus value (in this case '0') appears on one of the columns.
bizarre output.gif (image/gif), 94.23 KB, created by Mark Lytle on 2017-08-19 17:40:44 UTC
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Creator: Mark Lytle
Created: 2017-08-19 17:40:44 UTC
Size: 94.23 KB
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