Went to the car to take the CPL off and to reset the camera to defaults and can confirm there was no protective film left on the CPL or the camera lens.
Contact Viofo support:
support.viofo.com
I didn't mean cars that going the same direction, the licence plates visible no issues on those. The issue is reading licence plate on the cars on upcoming traffic (going opposite direction as you) because the speed doubles then me going 40mph + upcoming car at around 40mph = to stop frame at 80mph if you know what I mean.
although I'm bit sad now that I have to look at my dash reflection on my windscreen 
OK, I think I found the offender of the blurry licence plates. And the winner is a CPL filter! Unless the reset did something because I took off CPL and did the reset at the same time.
Here is the recording without the CPL filter and even at speeds over 40mph you can read licence plates
I hope it's defective CPL and it can be replaced and perform as expected. I will also try again tomorrow with CPL ON since I did the reset too just to confirm.
Yes, I did. The only thing that the filter was very tight to get on, I read in the other posts people had the same experience with A229 Pro and CPL hard to put on.
There was a protective film on the from of the CPL filter that I took off initially while installing the camera. Also when I took filter off today I double checked both sides with the nail to make sure there is no other film on either side.I am one of those idiots that forgot to pull the protective film from the lens. Took me nearly two days to discover my stupidity.
This is unlikely. Far more likely that it was due to a difference in lighting, you are driving at 6PM, so on darker days there will not be a lot of light for catching faster license plates. Do check it again with the CPL On in bright/sunny weather.
If the white lines were wrong then it would not remove the reflections from the centre of the image.Maybe some one from the manufacturing plaid a joke and put the white alignment line in the wrong place on my filter
Hmm, not sure about that because it was cloudy on both days when I tested it and with CPL I couldn't read the plates and without it even in the evening today I could. I will try it again with the filter. Does it matter how far in the filter is pushed? As I mentioned it was hard to put it on and I had to force it on not sure how far it suppose to go in.
I guess this makes sense.
No, if it is not far enough, the only effects are that it might fall off, and there may be dark corners on the image. If you use 21:9 aspect ratio then it is very unlikely that you will get dark corners, more possible with 16:9.
Yes, I noticed that, but there was not the same light level. It is very hard to judge light levels without a light meter, both in reality and from video, there can be quite big differences at that time of day, without it being obvious. That is the most likely main difference between the two, not the presence or not of the CPL, although that does make some difference.
Only the bitrate drops when connecting a cabin camera. The resolution remains unchanged regardless of the number of cameras.
Depending on your configuration resolution is as follows:
Not what the user manual says, and when I connect phone to camera, the option to set at 4K is missing when a second camera is connected. What am I misunderstanding?
You don't understand that 2160P is 4K, that is, 3840x2160P.