I am only saying this as devil's advocate:
If the league schedule was correct, suppose to bowl on 7 & 8, then according to Rule 106a you have to bowl on 7 & 8.
106a. Series - How Bowled
Two lanes immediately adjoining each other shall be used in each game of league play.
The first game of a series shall start on the lane where the team is scheduled with each succeeding game starting on the lane where the team finished its previous game. At the option of the league, each game or frame may be bowled on a different pair of lanes.
Key phrase "shall start on the lane where the team is scheduled."
Rule 100a. also states something to the same affect:
100a. Qualifications
USBC will certify leagues participating in the game of American tenpins with the following provisions:
1. All leagues must meet the following requirements:
a. Apply for certification through the local association in whose jurisdiction it bowls.
b. Consist of four or more teams with the playing strength of one or more players per team as determined by league rule.
c. Bowl in accordance with a prearranged schedule based on the number of teams in the league.d. Adopt rules and prize list (if any). (See Rule 117a and Rule 122.) (Suggested adult and youth league rules can be found on BOWL.com.)
e. All players seeking membership must be qualified under the bylaws of USBC. (See USBC Introduction, Chapter 1.)
f. Provide for the designation of a team champion by the games bowled in scheduled competition.
g. Govern themselves by USBC rules. Other rules may be added, but must not conflict with USBC rules.
Just sayin'