I agree that if Sergio was attempting to make an excuse for his laughter in the 911 call, it was not consistent with his other statements. But, it seems that some feel that SC's comment on Katie provides a reasonable explanation for why he seemed so calm and even chuckled in the 911 call:
"VELEZ-MITCHELL: Ha-ha-ha. A lot of people took offense to that. But we found out today on the Katie Couric show, Isabel`s dad said at first he didn`t think Isabel was really missing. Listen to this."
"S. CELIS: Honestly, at first, I didn`t think she was missing. I thought actually she might have just been taken by either Becky`s brother or her aunt, gone out for breakfast, something logical. Something logical."
But that is not all SC said on Katie. He immediately followed up with "And after a quick, frantic search with my sons...(sigh)...grabbed Julian, called Becky, and let her know...". SC said he first thought there was a logical explanation. But that was before the search, his call to Becky, and well before the eventual call to 911.
Apparently we are supposed to believe that Sergio then decided that there was no logical explanation and reported in the 911 call that he thought Isa had been "abducted", even though he was still calm and chuckling. I don't see how JVM considered this an explanation for the demeanor of the 911 call.
It also seems inconsistent that Sergio emphasizes grabbing Julian, calling Becky, and then holding Julian and saying "I gotta call" (apparently 911). There has been so much criticism because in the 911 call, SC said Julian was out in the garage and most of us never understood letting a child out of your sight, when you think your daughter has been "abducted".
If anything, I thought Sergio's "logical" comment on "Katie" might have been an attempt to explain his reason for saying this was an "abduction". He said they looked for logical explanations, then searched frantically, but by the time he made the 911 call we know he reported that Isa had been abducted.
SC's statement also brings up another question. Who was actually at the home the night before, or the morning of the disappearance? Was it "logical" to think that Becky's brother or her aunt might have taken Isa out for breakfast (while her father and her brother's slept) without first telling Sergio?
At an early interview (May 4), SC/BC were asked if there was a party at their home that night. Becky said "The only people that were with us were immediate family." I never saw anything more definitive than that. Some people consider "close relatives" like aunts, uncles, grandparents to be "immediate family". It was often reported that only the parents and the three children were in the home that night, but I haven't found that documented.
"Immediate family" question:
http://www.kgun9.com/news/local/150175035.html