adventures in suspension, Part III (last chapter!), dialing it in Options

[914 RZ-1]

I got all 4 corners done. I have a few questions I'd like some advice/input on. Answer some, all or just one, whatever you know. I numbered them to make it easy:

1. The fronts were a little off; I needed to lower one side. I noticed that when I did, the other side also lowered just a little. Is this normal? I got them the same height pre-test drive.

2. The backs are different by 19mm. What should I check for?
The lower spring retainers are on the same ring on the shock, so that's not it.

3. I bounced all 4 corners to settle them. Then took the car for a test drive. Nothing fancy, just a drive around the neighborhood. I turned the wheel back and forth, like I was slaloming. Anything else I should do?

4. Is there a way to tell if this is done "correctly"? Should the car be level? Where should I put a level to check?

5. What else should I check? It drove fine on the test drive. I didn't really go over any bumps, but when I pulled into the driveway I did not detect any bump steer.

Thanks!