ending with 8 players(dp/flex)

[Little Jimmy]

I may be leaving myself open to something obvious but what the heck. Fed rules. 10 total players on the team. Coach uses DP/Flex. DP bats 3rd. In the second inning the 4th batter is injured and cannot return. Flex cannot take that spot so one hole in the order, automatic out. Now 9 players in the game. Later the 5th batter becomes injured and cannot return, leaving the team with 8 players ( but two holes in the lineup ). Fed 4-3-1 g says (paraphrasing) game can end with 8 players (FP). My question is can the game continue with only seven batters? I don't see anything specifically stopping this. 3-3-6-f speaks of legally ending with 9 which seems contradictory. What am I missing?