ABC's 'The River' & darkness when there should be light

Because there was no new episodes of New Girl and Raising Hope, I watched ABC's The River for the first time. I easily caught up with all the story lines, which is either great idea for casual viewers checking it for the first time (though this is a serialized show), or lazy writing. Anyways, this "found footage" stuff is annoying, along with Jonas and his bad hair and scraggly beard. 

While the episode seemed to borrow elements from Disney's Pirates of the Caribbean franchise, the gist of the episode was that the crew get sideswiped by some "ghost ship" in the night, damaging their boat. With not having the much needed parts on board, the crew begin sending a mayday call out. 

Okay. Fine. Eventually, they receive a boat arrives to aide them, and the viewer quickly realizes that these 4 people may not be who they claim to be. So the last half is set up like a thriller, will the crew fix their ship before dawn, and what exactly are the four people who came from the other boat?

To heighten the tension towards sunrise, they kept flashing the time on the TV screen, and as dawn approached I was wondering why the area that the crew are filming in was not getting lighter as sunrise approached. More to the point, there was a part where the wife is calling out a mayday over the radio, and 6:45am flashes on the screen, and logically (unless I missed this in a previous episodes) the sky should be lighting the surrounding area, yet again, it's pitch black. 

So, I looked it up. If this is April of 2011 in the Amazon (which is where the series is set and the they also tell us what year and month it is), the sun rose began rising at 6.02am and ends the month even earlier, which means the sky would have been lightening for at least 1/2 hour to 45 minutes -so when that 6:45am flashed on when the wife was calling her mayday, the sun should have been up. 

However, because they film on location in Hawaii, I checked that and discovered the sun rise for April 2011 started at 6:25am and ended ended the month at 6:02. By any sense of the word, the sun should have been up, and the sky lightened. I realize to keep it dark was designed to heighten the suspense, and the show is science fiction/fantasy, but I'm guessing the producers are not expecting people to think this way while watching it. 

 Sadly, when not entertained, I begin to notice these faults.