I posted this in the Image Class issue queue #2173741: Classes can be added to any field, even if it's not an image?, but it seems to be a Field Formatter Settings issue.

Basically the field formatter shows up on all fields, regardless of it only being applied to the image formatter.

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Screen Shot 2014-01-14 at 4.35.02 PM.png65.05 KBkyletaylored
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Dave Reid’s picture

Dave Reid
he/him
Primary language English
Location Nebraska USA
CreditAttribution: Dave Reid commented
Status: Active » Closed (duplicate)
Related issues: +#2173741: Classes can be added to any field, even if it's not an image?

This is definitely a bug in Image Class. I re-opened that issue with more details about why. Sorry you are getting a run-around.