Getting to the Corporeal - Kyriotates of Dreams (Blandine)

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Getting more confused, APG, p 58 says Kyriotates of Dreams

On leaving their last earthly host, these angels can make a Will roll to manifest in the Marches for 8 hours, suspending the normal time limit to find a corporeal host.

Am I reading this right, that it means instead of getting a point of dissonance for (10 minutes times their Celestial Forces) in Celestial form on the Corporeal plane I get 8 hours plus (10 minutes times their Celestial Forces) for a point of dissonance?