Is it normal to try not to block people

I have been performing on stage for a while now as a dancer, and one of the most basic rules is in most cases, you shouldn't turn your back to the audience or block the audience's view of someone else. But I feel like that all the time, especially in the dance studio. I feel uncomfortable standing directly in front of something, especially if my back happens to be to the long mirror in the dance studio, even when I'm not dancing.