Cars not refitting before races !!!!!!!!!!

Second race I do, I click reffit all parts, and the cars go to the race with the older parts ! What am I doing wrong ???

I had that too one time, but I don't know why that happens.

Did you click save in the top right corner?

I've found using my work computer having the same issue, even with pressing save 
Do the same on my phone or home laptop no issue. 

I did click save. This time I think I solved. For you guys to know:

Do not tick the "refit" box, the one on the top that marks all parts. Do it one by one instead. It worked with me. I tried this after reading the game guide, namely: "Beware: parts with an improved design will not be on the car until you click to replace the old part!"

http://igpmanager.com/play/?url=guide/beginner#preparing

The text is ambiguous, but I ticked every part individually and it seems to have solved it.

Try it !

Good races.

save, go out to main screen, go back and double check. check again and save as needed.

If you wait until the last second to try to replace parts you can't save even that change once the session goes to qualifying. 

Make sure you have the needed staff needed to replace all the parts (look at the bottom of all the parts and make sure the engineers and mechanics are in the black after you save and not in the red). 

Also make sure you have the cash to pay for what you are replacing or parts won't get replaced either.