Are my new tires wearing properly

So I got some BFG A/Ts put on about a month ago. I got 265/75/16, had them installed by Costco. There is no rubbing at all with the tires.

Yesterday I was looking at my tires and noticed that the inside very edge of the tread still has the little "nipples" or "rubber hairs" on all four.

Is this normal? To me it seems like it should wear evenly across.

 

AND after reading other posts I'll do a chalk test tomorrow cause I'm sure someone will probably suggest it.

 

Did they check the aligment?

 

Nipples on the outside and inside edges?

 

It's not pulling..I don't know how to check the alignment otherwise.
And the nipples are only present on the inside edges

 

Have a shop check it. Just because it doesn't pull doesn't mean your alignment is within spec.