Sure Zeke might be out of position sometimes when he is blocking, but the real issue is he's just not a very good rebounder by form. He, like many of the Zips players, doesn't get in good position for rebounds and doesn't use his body well to move the defender. I think we can all agree he needs to have more of a killer instinct when he plays, but just learning how to properly rebound would be a great start.
Btw, I'm open for coming to practice for proper rebounding instruction of any of the coaches read this.