If an auto seedling is tiny and I mean tiny is it ...

No the size is not important ac long as you have a healthy popped tap root and leaves look green and healthy then your good. Health is your main concern to start. Let nature take it's course plenty of time to weed/filter out later.

Not necessarily

So of the two chem dawgs I’m growing right now the small seed is the bigger plant. I figured it would be a runt or a dud, It even sprouted backward. It started off slow but after like week 2 or 3 it’s been the better grower. I would give it a chance and see where she takes you. Every seed is a journey🙏

Trusted company? Normal color? If it germinates than there is a big chance it's the real deal.

If the color is correct (brown with darker spot for example) is a good seed! A lot of genetics have smaller seeds :) but the minimum dimension is 2-3mm If it is white, is bad :) indipendently from dimension

How about a photo? How about more information? What is tiny to you might be microscopic to me and gigantic to someone else and perfect to another person...

Photos would help or better yet a linked diary to the plant in question, Prob need to start over if its still not growing well in its third week. Good Luck!