Owners/service Manual problems of the 2016 Honda Civic

Issues: under splash / guard falling down - yonkers Honda service parts state it is physical damage for the under splash guard to fall down and not possibly the screws getting loose. Yonker service parts said it was normal wear and tear and that I must of went over something that pulled down the under guard. I now have 11,900 miles and car under 2 years old. Initially I had to go to a local dealer to not replace but to put screws in, so I could go to my Honda service to inspect why this happened on a new car. I was only charged $71 to put screws in. All parts were still intact after splash dropped and I had to drive to get my service to a place closer home because dragging my under guards would mean greater damage. By the time I made it to Honda service, the splash dropped again and Honda stated I needed to replace the underguards that were still in tact but a little bent from dragging. They said it was external physical damage and not a defect and then quoted me $400 and put ties up so I can drive the car. I looked up the parts at a Honda parts service dealer and the parts I am quoted are way more than what I noticed for the market. Four months into having my car, all 4 car windows come halfway down after exiting the car and pressing down the lock with remote. No information on why this is happening in the Honda manual. Honda sevice auto parts advisor stated this is normal and there was nothing to do. Photos show initial fall of under splash in January.

Tire pressure monitoring system light erroneously illuminated at about 750 miles while travelling on interstate. . . Car brand new. . . Checked all pressures at 65f cold and all at pressures specified on door jamb. . . Did not find any punctures or objects in tire. . . Haven't taken it to dealer but I manually reset system by "calibrating. . . " light is now back at about 825 miles. . .