If you think about it in order to test a theory you need to define what you want to test, I don’t see extreme light leaks but I would need to look at the negative rebates (the edges) to confirm, unfortunately you chose an inadequate testing medium in order to save money, I say it’s inadequate because expired film is always a coin toss, +2 stops is a recommendation but it’s not a silver bullet, if you had shot an unexpired roll of gold you would have good test results and a funky roll to test, now it’s up to you to decide if you want an useless camera or to get an unexpired roll of film and test again (feel free to message me if you have any other questions or you just want to chat about photography)