Actually, I've been around this 'technology' thing for a lot of years. I'm a bit more than a novice user (quite a bit). And, since I am the "IT guy" for my home/home-office, I'd be the only person to make a change to either side. Seeing as how it's my own Droid, and my own gmail account, I'd also know if I'd changed any settings - and have, since the problem started, checked and re-checked all of the settings on each side.
So, if you think something changed, AND you know what it might have been, I'd love to be enlightened by the details from your analysis.
Thank you,
~C