except you are supposed to keep seeking to do his will no matter how many mistakes you make and sinning you do along the way
this is my current interpretation of the scriptures, does this seem about right to everyone ?
basically, how can there be any certain sins that would cut you off from being sealed by the holy spirit and forgiven for all past, present and future sins, unless you do not seek to do Jesus's Will ? because Jesus says that those who do not seek to do his will are cast away
and I do not think that it is for any of us to try to judge another who is truly seeking to do Jesus's will or not, because that is between each individual human and God which is why Jesus says not to judge or condemn anyone else as unworthy of salvation