I know that every instructor out there has had a student say to them, “That’s not how I learned to do that” or “I learned to do it like this.”
Every submission and set up is a little different from one person to the next. There are many ways to do each submission. Catch-as-catch will have a different grip or angle for a move than BJJ but it doesn’t mean that one is right and the other is wrong.
There are a million variations to each move, so yes, you may have been taught it one way. Now shut up and learn it the way your instructor is showing you. It’s good to have variation; everyone needs to play to their own attributes.