The clothes would not bug me in the least.
However I could not let the inappropriate seat slide ~ having taking the carseat installation training to do inspections and installations for others the images of children in 'improper seats' haunts me! The fact that we once had 'no' regulations for seat belts and people survived is just silly ~ once upon a time there were MINIMAL cars on the road cause it was a 'luxury' to own one ~ now not only has our populations soared but not only is it the norm for every household to have ONE car but most have MULTIPLE cars that are now on the road .... we drive more, we travel faster, as a society 95% of us seem to drive distracted and the fact remains that statistically there are just MORE ACCIDENTS that require more safety precautions to help prevent death and injury .... but if we are not going to USE those precautions properly than they are useless!
The weights and heights or ages given are minimum safety standards to take into account when choosing which seat is best for your child. Before changing to a new seat you should be OVER that weight requirements for that seat before moving to it not just 'sneaking up on it' so that if you poop or something your back under it again ~ at his weight of less than 20 pounds he should still be rear facing in a seat that accommodates rear facing .... 22 pounds, over a year old and walking independently are all requirements for forward facing in Canada. I regards to accidents causing injury the rear facing is the safest position to be in and ideally they should be doing so as long as the seat allows so ~ some seats can rear face to 35 or 40 pounds...the longer you can give a child's spine and muscles to develop strength the better. It is better to break a leg because it is bent in the rear seat than snap a neck in an accident and be dead or paralyzed for life!
So if they have switched him to a forward facing seat for an over 22 pound child and he is not meeting all those requirements than yes YOU risk the fine if your pulled over but worse if you are in an accident and he is injured and medical treatment show his weight and size was not appropriate for the seat you had him in your now liable cause they will be doing the assumption that 'had he been in the proper seat he may not have sustained these injury' thing :(
IMO we already take a huge liability risk transporting children in our program because we cannot control other drivers on the road ~ taking a further one by not having them in the correct seat while doing so is just not worth it!