Vietnam visa questions

Vietnam Visa Approval Letter

I have received my approval letter for entering Vietnam, however, the letter also mentions 8 other people that aren't in my group. Is this correct.
need a Vietnam visa or not

Vietnam visa for tourism

For citizens of Belarus for a stay of 15 days it seems that visa is not necessary while for Indian citizens visa on arrival is required. Can you please confirm and suggest the best way to proceed to get the visa?