Large HIV database inflating matches is indeed a big concern. But dismissing one miss matches sounds arbitrary: these segments were not arbitrarily selected, but real insertions on tops of sars.
I just did the experiment with my first name that is coincidentally 6 letters long, and lo and behold: a match to HIV env protein!
Has my first name now been designed by a bioweapons facility?
No, of course not. Your parents were designed by a bioweapons facility, so that they would choose that name.
;-)