single quote showing in numbers

Title says it.

Screenshot – http://midliferiding.com/images/pcv_quote.jpg

It’s like the #3 or #4 get converted to a single quote when the view count gets past 10. I’m not sure if it’s the 3 or the 4 but basically 10, 11, 12, 15, 16, 17, 18, 19 … 102, 105, 106 … and so on all work fine. but anything with more than 1 digit place with a 3 or 4 in the last digit spot (13, 14, 103, 104, 993, 994, etc..) show the quote instead of the number.

https://wordpress.org/plugins/kento-post-view-counter/