Update regarding question #1:
I changed the mobile results width and height to 100%, (See attached image) which seems to have worked on Safari but not on Chrome or Firefox (I have cleared cache for both browsers). So desktop now has 3 columns and 3 rows and bottom pagination navigation. I would like mobile to have 1 column and 5+ rows (if possible)… mobile should have a scrolling feel before you get to the bottom pagination navigation. Is this possible?