Can't log into same account on different devices

Hello! i am new to label studio and i have installed it on ubuntu and win 10. after i signed up in ubuntu's LS, i tried to log into my account from win 10's LS, But it said "The email and password you entered don't match". and LS allowed me to create another account on win10 with same email and password. Won't this issue leads to problems like creating multiple fake accounts in only one computer with multiple VMs and use all of them to swarm to projects?