Motion event slow to activate recording

Hi, so I have my ring doorbell and ring cam set up about a week and a half now. I get a milk delivery 3 times a week so at this stage I've had 5 deliveries since installing. The milk man runs across the front of the drive and then up the drive. The first second or two is always blurry and by the time it clears for a good view, he is on his heels heading back out the drive. This is ok because I know who it is but if it was someone I didn't know, I would have no chance of identifying who it is. I live in a quiet cul de sac so I have sensitivity on both devices at the highest and have both link recording. If someone walks past my driveway it picks up straight away and I can identify who it is. But someone running in is very slow to pick up. Also, I can't seem to get a motion event to last longer than 30 seconds on either device even though the motion is still active? Is there a way to extend this because otherwise it is pointless having them. All someone has to do is walk into the garden, turn around, wait 30 seconds and then proceed without being recorded.