When clicking the "submit" button to register for this account, the website lagged so I clicked the button again. After that, the page simply refreshed, so I tried to register the same username again, at which point it said the username was already taken. So I tried to register a new username called "Paccaya," and the same process repeated itself. At that point, it occurred to me that perhaps the prior account had already been created (while the website was lagging) and that that was the reason why the name appeared to already be in use. This turned out to be true, so now it seems that I have created two accounts: one "Akalika" and one "Paccaya."
Obviously, having multiple accounts is against the rules, and it was not my intention to make more than one. I'd prefer to keep this username and delete the "Paccaya" username.