saw the pattern. I can also see where u have might have gotten it wrong but its not your fault its the pattern instructions.
I recommend that you do the baby beanie cap using a larger hook to make it for adult size. maybe a size K hook would or J, play w/ hook size to get the right dimensions for adult size. for baby I used size F like the pattern says and the baby cap comes just right.
art of crochet by teresa is good for beginner.