Car Seat Clinic

Today there was a free car seat install clinic offered at the Superstore in Aurora. I decided to go to get our seat checked as I hear the percentage of seats out there that are installed incorrectly is quite high and I wanted to be sure Alyssa is as safe as possible in her seat. When I got there they had "cancelled" the clinic due to rain. However there were still 3 people there checking seats and it was quite disorganized. They weren't really sure what was going on and as such I decided to wait a little. One of the men who was checking seats then announced he would help only the pregnant people (who arrived AFTER me) and not those with children. Another lady who has 9 month old twin boys had arrived at the same time as me and we couldn't believe they'd help the pregnant people first, given that we already have children who are riding in these seats. Eventually the public health lady who was there helping announced she had called the police back, who had originally cancelled the event. Then she said she wasn't sure who had arrived first (perhaps pass out a little piece of scrap paper with numbers on it to keep track?) but the twins mom and I voiced our concern that we had been there for quite some time and we were next. A nice officer checked our seat over and luckily it was installed "pretty well" he told me. With the larger (step up from the infant seat) rear facing seats you need to use something to make sure they are level with the ground to achieve a certain angle. While it sounds funny and unsafe you actually use pool noodles to achieve this. He had to add another pool noodle to ours. Other than that we were fine and I had been placing her in the seat correctly thanks to a car seat install clinic I saw televised on Breakfast Television. He advised me to not use any of the baby mirrors that you see around that allow the driver to see baby, he said they are distracting and if you are in an accident they can become lose and hurt the baby. He also said once the winter comes you cannot use a snow suit for baby and the baby can only have 2 layers of clothing on for the seat to work properly (otherwise you cannot tighten the straps enough). So does this mean they expect me to take a jacket off Alyssa before putting her in the seat? Or wear fewer layers of actual clothes and still wear a jacket? This is something I'll have to get my head around.