After using the trip computer for a week now on my 96 mile each way comute, I have noticed serevral issues that I wanted to see if anyone else has or do I just have a defective unit.

Clock and Average miles per hour:
The E/T always seems to be incorrect. Example, after exactlly one hour of driving freeway (both confirmed by the clock on the dash and my cell phone), the E/T stated 0:43. Also, when done with my trip and hitting reset, I look at the history for that trip and see I was driving at an avaerage speed of 91mph.

Instance MPG:
When reseting the trip computer at a standstill and the start driving on a freeway, I can see the instant trip computer at 50MPG, but the average MPG on the trip computer is 29mpg. I can run for ten minutes at staying between instant of 40 and 50 but the average gets up to 31mpg. Is this just a sampling issues with the instant bars.

Trip Computer vs Trip A odometer:
I filled up, reset both the trip computer and Trip A odometer. After 1 1/2 hours of freeway speed, both have the same miles, but the average MPG if not the same (29.3 vs 31.6). Do they not use the same algorithm?

I am a new HAH user and just wanted to see if these are common issues or should I take my car back in.