JS-
I agree with your observations.
Moreover, the SBT posits after being shot through the chest and his right wrist, and having the high-powered and large slug burrow into his left thigh...after that, only then does Gov JBC make a 180-degree turn in his seat to check on JFK.
That does not hold water.
JBC said he was immediately incapacitated after being shot. I believe that.
I have reasonable doubts about the WC SBT narrative of the JFKA.