what happens to waitlist on married segment flights?

I have HND-HKG-TPE. Originally it was waitlisted as married segment flight. The segments never cleared.

Today agent was playing around with my booking (ticketing agent, not the clueless MPC agents). She basically said somehow HKD-HKG cleared so she confirmed this first, but waiting HKG-TPE to come through. I thought married segment must clear as a package, not individually. Now i'm waiting for the HKG-TPE to clear, and she said once each of legs are confirmed she can "marry them back" again. Is this true???

I'm worried that each of underlying is cleared as Tokyo Point of Sale HND-HKG and HKG point of sale HKG-TPE such that they won't allow me to marry this.

As a side question also, say my HKG-TPE never clear. If I show up for my HND flight before my HKG-TPE is cleared, will I be denied boarding at Tokyo? It's supposed to be HND-HKG-TPE but HKG-TPE has 24 hour stopover allowed. I wonder if I can just show up for my HND-HKG flight without confirmed HKG-TPE?

Needless to say I will be forfeiting HKG-TPE. I got this ticket 75% discount to straight HKG-HND. Thanks CX for the arbitrage opportunity.