Who Me Too'd this topic

When I log in through the browser (desktop), the account overview and the top right corner displays my username as a string of 25 apparently random numbers and lowercase letters (maybe it's a hash?). If I try to recover the password using the username that I actually typed, I receive no email. The weird thing is that when I click help, the top right corner name changes to the username that I chose. Also, when I look in the android app, it shows that I'm logged as my chosen username. So apparently, that username is linked to my account, but only on some contexts. Is this expected or normal? I created my account two days ago, using the android app.