Hello,
Adding a follow-up.
Contacted AcuRite (I purchased directly from them) and they sent an RA label for shipping. After being there about 3 days, they sent it back saying "Our Quality Control Specialists have made improvements to your unit, retested and it's working well." I only lost 10 minutes the first 3 days, then another 20 over the next 2 days and now after 9 days I'm at 4 hours behind. There is a new unit being shipped and should be here in a week.
Thanks for your help.