First an emergency call out can only be called when the discretion extends beyond 1 hour, or, the total sum of all discretions in the last 7 days extends past 2 hours. Your example shows just 2 x discretions, nothing else (0230 each night =1 hour total).
Your supposition of an extended FDP rolling over into the day off, is correct. I.e. day off is nullified. And a day off must have 2 x nights to qualify.
P.S. The PAOM 1 doesn't mention..."rest days"...its a pigment of your constipation...
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TC