"What two points are you using?"
I actually used three points. Look at the picture below. I used the ne corner of Freeman Island, the sw corner of the first jetty, and the gap between the northernmost jetty and the breakwater. All are visible on Google earth. Connect those three dots, and you have a line of sight between the helicopter and the contrail. "Lens distortion" etc has nothing to do with it. And if you want to argue that the lens is distorting what you see in that image, then the whole argument about contrail direction etc is moot. Also moot is your discussion about questions regarding the location of UPS902. We know exactly where it was at minute by minute intervals. The fact that the triangulation between the Cargo Law camera and the Leyvas video still below is almost perfect with respect to the Flightaware data is pretty damning to your arguments. Unless you believe all three entities are in cahoots to hide "the truth". 
"I have yet to see any source for that except the fill-in statement made by a CBS reporter who wrote a small piece on this. He didn't say Leyvas "started taping" at 17:15 either."
I linked you to a source for that last night.... Cameraman who filmed “mystery missile” describes spectacular sight Here is a quote from that link "He said he was aboard the television station's helicopter shooting footage of the sunset over the ocean about 5:15 p.m when he noticed the spiral-shaped vapor trail and zoomed in to get a better look." You are grasping at straws now, with even less evidence then before to back them up. Dr. Brian Kopp is in contact with Leyvas. Perhaps he can ask him what time he started filming. And if he says "around 17:15" what straw will you reach for next?