I have no idea how my hospital works like that.... they do that even if the dr. Sends you over?
This is how it works at my hospital: you have to progress at the hospital in order for them to keep you.
For example, I went to the hospital and I was 4 cm. They said the only way they would admit me was if i progressed, so i could either go home or walk the halls of the hospital for an hour. I decided to stay and walk (in tears because of contractions).. They checked me after walking for an hour and i was 6 cm so I was admitted.