Sadly this is a common story with CVH cam's these days, what kit have you bought now? Newman are the best available IME.

As mentioned above flush out your engine to get rid of any swarf left from that lobe, new oil and filter of course too.
10-12psi is a bit low for a new engine but only a little, as you've had a lobe break up it would be worth inspecting your bottom end shells too.