Problem with Adobe sign marking lines for signature incorrectly

I am using a legal form with an index.  Adobe is identifying the dotted lines in the index as signature lines that should be set up for signature.  This is causing the form to malfunction when sending out for signature and marking the one space for signature as usual.  Not sure if this is a bug from the upgrade. I never experienced this issue with Adobe before and I've been using it for electronic signature for over two years.