First time replacing heads and weird gasket issue.

trigger_andy said
Thank you. Then my groves are in the correct location. What do these Grooves actually do and why do they have to be in this position?

The shafts have holes in them, through which the rockers are oiled
But the holes are drilled in an offset pattern
The grooves are simply there so that you can look at them and see if the holes are lined up right or not