Not good but always happens spend too long in the shed trying to sort out problems creates more on the home front.
Hydraulic lifters can take a while to pump up, i know on a forum here some one had some dodgy lifters that were brand new and refused to pump up, hope this is not your case, it sounds like you have plenty of oil pressure, just double check all bolts even if others say they have checked them you double check it is your motor and money