Hey there! Don't sweat it too much; cars can be a bit quirky sometimes. It sounds like a hiccup that might not be a big deal. Your AGM battery with the voltage booster should generally be good to go. Maybe it just had a momentary glitch or something. Since your voltmeter was reading fine and the second start was normal, it might have been a random blip. If it keeps happening, maybe check your connections, but for now, I wouldn't stress too hard. Oh, and about that long commute, it's good to keep an eye on your battery's health. And speaking of cars, have you ever thought about
car shipping door to door? I think this is a cool approach by many car companies that care about their customers.