At the top of the handle rules it states:

Your handle must include a first name and a last name or sound like an alien name.

But later it says You must use a full first and last name:
The system doesn't let you input a name for request without a first and last.

Am I misreading the first part of the rules, it seems to me to imply if it sounds like an alien race that doesn't use two names, it doesn't require one.

Your handle must have a first and last name. The reason for this is the handle is decided before the race is decided.

I'm guessing this ambiguity will be fixed up when an admin reads this.

It's to prevent people from creating names like "Wtfrolf Lolomgbbq".

The above posters are correct; it might be faster to start a thread in the Rules Update forum to get that conjunction clarified.