My understanding of how the H&H system was originally set up was that over the 6 years it would take to go through all the teams, you would play the rotating teams 7 times. You played everyone at least 3 times at home and 3 on the road. For the 7th game, you would play half of the conference on the road and the other half at home. As an example, for UVa it has worked out that we got the extra home game vs. UNC-CHeat and uke got the extra home game against us.
Now, that's all changed. We played ND H&H in the first year of the expansion and will play them H&H again next year, while we still haven't played BC H&H.