its because lewis knew by then he could no longer win the championship and lost focus,whereas jenson was desperate to finish runner up.
and this on average stuff is nonsense.we've seen every season lewis be atleast 4-5 tenths quicker than jenson in quali very often,occasionally almost a second quicker.
and lap times during a race dont mean too much because of the different positions in a race each team mate is in at different stages in a race.
a focused lewis will beat jenson everytime.jenson only has a chance if lewis loses focus,and they keep messing up lewis's pitstops and underfuelling his car.
this season as the seasons gone on they have been forced to not mess things up for lewis to help button,because despite everything theyve done to lewis it hasnt worked.
i.e in both those races jenson got a dnf,he was only ahead of lewis because they messed up lewis's pitstops.
but their last attempt to get jenson up in the standings with lewis was to focus completely on button and give him all of lewis's data.
then they messed up lewis clutch settings in germany to make sure he didnt get ahead of jenson at the start of the race.they used the same tactic in australia to get jenson ahead of lewis at the start.they both had different front wings for that race too.
anyway they thought that making sure jenson finished ahead of lewis in germany would raise jensons confidence,and then he'd go on to beat lewis in hungary too,but it didnt work.
so now theyve decided they cant keep helping jenson in the way they have,so they now have to accept that lewis is their best hope for the championship imo