ok as trip said, that is a wet test!
and yes throttle should be kept wide open in order to obtain a true reading and create no vacuum, but the readings will still approximately be the same.
also make sure you remove all the plugs before doing comp test as it can mess up the readings if you have a cylinder leaking into adjacent cylinder (which is a possibility here).
try doing the test again, let us know the readings, then do it with a spoonfull of oil down each plughole and note readings then!
btw aron that k seal is good stuff but wont work on a forced induction engine with steel gasket if its blowing. the other stuff is better (seal up from the states) but that wont work either, will only seal small cracks in head, block or coolant system. better to do the job properly