Think this thru.
Any really wide head will strike with the edge, not the tip, on an oblique shot. Yes, either the deer spun or was never actually straight broadside when you shot.
When you hit the deer obliquely, the head will travel along the body, causing a long cut wound, until the tip catches on something enough to cause it to dig in.
The only way this doesn't occur is if the arrow is spinning just exactly right on impact so that the head is mostly straight up and down, allowing the tip to work.
Hold one of your arrows with Simmons (or any other wide) head straight against a flat surface, then move it to the side and see what I am talking about.
I have had this happen to me several times using wide heads on hard quartering shots. Narrower heads don't do this near as much.
BK. . where did you hit it where you "didn't get but 1" penetration" "didn't go thru the ribs", but you still killed the deer ?
ChuckC