Bag of Lies

I can't get over how the premise of the movie is very similar to Baghead. I enjoyed Baghead a lot and it was something very different but to watch basically the same style of movie again felt very unoriginal and cheap. It was strange that the lead did everything that was instructed of him not to do. Like every little thing. I was also confused about how the spirit presented itself throughout the movie by appearing as different people. I didn't know the lead was taking medication for what I assume was mental issues while the lead women took medication due to cancer. I will say while the premise is similar the plot isn't. The ending is confusing though because I'm not sure who or what I'm looking at in regards to the wife and what the ritual actually did. I don't want to spoil anything so I'm trying to be as vague as possible.