Labels wrong

I’ve noticed my labels are wrong… they are cut off and also display single quotes.

e.g. my labels say “Email” and “Your name”, but they display as

‘Email’
‘Your

(single quotes included!) How to fix this?
This is an example of the sourcecode in firefox:

<label for="g748-8217email8217" class="grunion-field-label ’text’">’Email’</label>

It looks like there’s something going on with the parser? Somehow the quotes seem to be saved in the database perhaps?

https://wordpress.org/plugins/slimjetpack/