Nostalrius Begins - Quality wow vanilla realm (1.12)

hello, im playing wow at my home, my mom and at my brothers home.
but when im am at my mom and my brother i get logout pretty quick...
WHY?

why cant i login and play on MY account like blizzard retail did at vanilla??

//regards johan

You cant have 2 people using the same account at same time, here or on retail.
If is 2 separate accounts u should be able to play it