Just to be clear on the qualifying procedure...
Sat Qualifying:
. Jim - 1:28.361
. Matt - 1:28.507
Sat Race best lap:
. Matt - 1:28.900
. Jim - 1:28.990
The Sunday grid sheet shows (as it should):
. Jim - 1:28.361
. Matt - 1:28.507
There have been other comments about using one's best lap in either Qualifying or Race.1 to set the grid for Sunday's race, but there are several scenarios in which one could turn a better race lap than they did in qualifying (particularly if there's only one session):
1. mechanical issues in Qual
2. weather issues in Qual
3. less traffic issues in the race (more pertinent to multi-class run groups)
4. driver is new to track and learned more during race
5. for a three-day event, driver couldn't make it on Friday to qualify
Counting one's best race lap in addition to any qualifying sessions gives a driver an additional chance to earn her/his "rightful" place in the Feature race, plus it helps satisfy the drivers' requests to (1) have two races and (2) have more racing and less "driving around real fast".
On edit - Now that the correct grid sheets for Sunday have been posted, look at Group 2. Nigel Saurino went faster in Saturday's race than he did in Qualifying (and also won FP), so he moved up to third overall for Sunday's race.