I think I understand the query as this seems to happen to me too... on 'a good few but not all' occasions.
Note: Most of my racing is on non-standard 'Gedinne 2011, Donington 2011, Goodwood ect' tracks using 'Classic cars in the form of GTL-GTR2 plus mods.
Once I am satisfied with my Qualifying time (perhaps top 6 on the grid) I pit and check the time sheets, I might see several cars (Jag mkII 4.2, 1310 Mini.. and others) have no posted times, I press the 'accelerate time' button to bring the session to a close, looking at my place (in the top 6) I advance to Race... but I find the grid mixed up with me in 'perhaps' 24th and some of the slow or 'no time' cars at the front.
I cant understand why this should be as I have selected to practice, qualify and race.