We honestly don't know for sure.  We can only guess the reason why no one has raised the issues is because the company you had been attending previously didn't feel that the issues fell under the fixed price services that you were getting.  It is of grave concern to us that customers are bringing us regularly serviced cars, which have dangerous and unchecked problems with poor quality workmanship.  When you bring your car to us, we will list every issue that we feel needs to be fixed, and then you have the choice to fix it.  It is our responsibility to tell you of the faults, and it is your choice to have us fix them.