Hello! I'm having a problem with the BOMs in my assembly drawings and it's driving me insane.

I've been making large procedure drawings demonstrating each step of an assembly. On each page, there is a BOM showing only the components necessary for that step. To do this, I've been selecting uncessary components and choosing "Exclude from BOM." I go through the entire drawing and everything looks perfect so I save and close. Next time I open the drawing, the BOMs are all expanded to include every component (AKA a bunch of stuff I don't want!). Does anyone have an explanation for this? Hiding the componenets is a very tedious process and I've wasted a lot of time redoing it.

Thanks!