It is possible that it wasn't rolled adequately (mini-roller) or was rolled after it was too cooled to compact correctly but my guess is that you now live somewhere hot.

In hotter climes asphalt isn't used as much for driveways because it absorbs the sun's heat and softens. Here in Upstate SC with our 90+ degree summer days, it's normally used only for long driveways, then tied into concrete near the house because even done correctly a car can settle into it if it's parked in one spot for long leaving permanent depressions. It's more common when they used a mini-roller (not the huge ones you see on road paving projects) but even with big rollers and done at the right time, it's not uncommon to find these slight depressions when it's less than a year old. Just be glad you didn't park your new sports-touring bike on it as the kickstand would have sunk and it would have fallen over breaking the expensive plastic bodywork- another common experience with asphalt in hotter climes.

In parking lots and roads normal traffic eventually 'rolls' it all down pretty evenly, but driveways don't get that much traffic. It should 'drive in' and it will help if you don't drive just up the center, but stay 6-8" away from the edges which may crumble while it's new, and don't leave anything parked in one spot more than 24 hours for a few months.

Phil