The reserves last weekend. 5 teams, including at least one in every game, kicked 8 goals and more behinds than goals (range: 8.12 to 8.19).
Not sure how you fit that into a neat statistical question, though. Other than the more general ones:
1. Highest number of teams who have kicked the same number of goals in a round?
2. Highest number of teams who have kicked the same number of goals, and all of them more behinds than goals, in a round?