[NM FP Ump]

The affect of Sub1 coming into the game in the 8 spot would be as a substitute for "starter 8 spot". Next time they batted, they would bat....6 spot, 7 spot, Sub1 in the 8 spot, 9 spot, 1 spot, etc.....with "starter 8 spot" as the substitute.

USSSA does have an "illegal player" rule, but it only applies to starters/substitutes that re-enter in an incorrect batting position, or starters/substitutes that re-enter a second time, or using a pitcher that has been removed from the pitching position.