New BOY MOM !!! Help

So my baby boy is 1 week old today !!🥰🥰

And I’m still confused on the whole diaper changing thing with him I change him every 2 hours on the hour with every feeding I change him but last night he peed thru his pjs 3 times anyone know why ? I’m using name brand diapers I used a size NB (huggies)it happen so I tried size 1 (pampers) it happen am I doing something wrong ??? I’m a new boy mom I have a daughter already and I never had that problem so often ( and yes I make sure his private is pointed down )