my high school coach seemed to make a big deal out of people doing both, she said that she didnt care but it was obvious she had an issue. I ended up quiting my varsity squad my senior year actually because just out of luck my first competition of the season for both my high school and allstar squads were the same competition. I had competed in the morning with my allstar team, and me and my high school coach got into a fight because she expected me to leave my allstar squad right when my high school team got there. This was before all the teams in my gym were even done competition and even before my awards. After all the drama was over with she also told me in warm ups for my high school that I had to water down my pass for no reason, when i had landed a much more complicated pass with my allstar team earlier that morning. So i decided i wasnt going ot deal with her politics anymore, and stuck to one team.