I'm not sure if your movement is maybe stressing him and he's following you in an attempt to keep an eye on the "predator". I've seen similar behaviour in a couple of rescues we've done over the past couple of years but once they settled in they stopped that constant keeping an eye on us behaviour. Not sure if this could be the case with Zeke though or not. You could try crumpling up a bunch of loose newspaper and dropping it in all over his enclosure. It helps them feel like they aren't exposed as they rustle around between and under it. It's a wonderful trick to help settle down a nervous snake.