MPG sucked after accident and missing screen...

I was rear-ended on a late November raining morning on the freeway driving between 60-65 MPH from a guy who claimed he fell asleep. He must have hit me 10 to 15 MPH more nearly caused my car to spin out but I was able to control it. The only damage is....rear bumper...not to mention few days of neck sore but nearly a month of back pain which is nearly healed now.

After my 2012 Prius C was repaired to a tune of $3,100ish (they found hidden damage beyond rear bumper).

After I got my car back and in the last 3 weeks I noticed mpg sucked (compared to the usual driving in the past 2 1/2 years!!!!)

ALSO....the screen info is missing 5 minute graphs and the settings are grayed out except time, date (I can't change anything, even comparison mpg from old car!) I did notice some changes to it so I was wondering if repair shop upgraded it because it is without my knowledge! ugh! Thoughts?