I'm thinking I have determined through all the help everyone has offered that the culprit is an improperly assembled arrow. Thanks to
@Matki15 who pointed out that Easton requires a broad head adapter ring to protect the shaft. Shaft integrity was compromised. I can imagine that anything can happen when the broad head is no longer solidly fixed on the shaft. I do agree with you about the deer's change in position effecting impact point and trajectory of the arrow after impact. Couple that with a an arrow that comes apart on impact and I'm pretty sure we answered the questions I needed answers to. Now moving forward, I need to think about my arrow set up, bow tuning, and broad head selection.