1.1. Prompting, 1.2.2. Grouping/Distinction by Format, 1.3. Immediate Feedback, 1.4. Legibility, 2.1.1. Concision, 2.1.2. Minimal Actions, 8. Compatibility
It could be that there was not much investment put into this module.
Regardless, more care should be put into this site in order to bring it up to the known Yellow Pages quality.