have you tried blowing into it (or get a wife/gf/bf to try..) and seeing if the pressure changes?
Could be a software thing. I wouldnt tell you not to try a different firmware.Perhaps try a newer one?

It definitely is strange

 

I have tried blowing it. It does change the reading.
I have also tried TS 3.3.3 and 3.4.2. I'm out of ideas

 

77KPA is roughly 8000ft at 80 degrees F. I wonder what would cause it to read incorrectly unless you are somewhere close to those numbers?

 

Im about 50miles from Los Angeles, about 700ft where im at. About 80 degrees today.

Is there any way improper voltage or anything related causing it?

 

Maybe a bad ground but you would have a ton of other problems.

Do you have a mighty vac by chance? Try dialing in some vacuum and comparing the gauges

 

Ya, that makes sense with the ground..
Not sure I get what you mean by dialing in some vacuum

 

I mean connect something like this:
And pump it a few times and compare your values between the gauge on this and on MS..

 

Oh, ya that makes sense. Not a bad idea. Then at least see if it's accurate