Interview with both! This is a big red flag for both, but issues with the interviewing process don't always mean there are issues within the work place at the c

Interview with both! This is a big red flag for both, but issues with the interviewing process don't always mean there are issues within the work place at the company. At worst, you just use the offers from these companies as negotiating tools (as another commenter suggested)--they certainly deserve it. I would suggest sending an email to company A, worded something like: "I am scheduling on-sites between April xx and yy. Is there a day that would be good for you, or should I remove you from the list of companies I'm considering?"