1 out of 11 does not huddle to sleep
I'm new at this so take my info with a grain of salt, but all things being equal I wouldn't worry about it if nothing else seems amiss. My gals kinda sprawled anywhere they pleased and sometimes there'd be a couple in a pile and other times there'd be an outlier or two. Even now at 6 weeks and 4 days out in the coop there's a bunch clumped under the lamp and two are up on the highest roost, It's not cold out (in the mid sixties) so I don't know why the birds that are under the lamp are there but they are. Others are just kinda scattered around. I only worry about them if they're showing signs of stress.