Congrats on your Nammor! I love that hookah
Anyway the small chip on the bowl might mean it was damaged during shipment. I wouldn't get too concerned about the base not being perfectly circular but if it is odd looking and non-standard I would email HS about it as well. The small grommet they sent you is probably for you just in case you wanted to use a standard Egyptian hose with a small hose port so you can tightly fit it into your stem.