The reshuffled lineups do not include "alternates." The cars that will not be returning were removed from the qualifying lists and those who were returning were re-paired based on their original qualifying times and new qualifying positions. Since eliminations never started, those who qualified but do not return get no points and those who moved up the list to fill the vacancies get points based on their new qualifying position and full prize money. The fields were closed - no new entries.
IHRA does use alternates in the first round - but an alternate does not get any additional points. The original qualifying driver gets the qualifying points and round one loser money. If the alternate advances to round two, he gets prize money, minus the amount paid to the original qualifier, but still no points. Also, alternates are inserted on the ladder in the position the missing driver qualified for, the ladder is not re-paired.
In other words, for those who do not return, it's as if they weren't there.
Had they run a round, then postponed, the fields would have been frozen and the original ladder followed.
