Yours will copy a record in your grub config, for every kernel install, because that’s the easiest way to get your ancillary settings. If it’s happening truly every time, then I’ll bet that’s borked somehow.

I ran into this because grub config now needs an additional magical parameter no one mentions, because it manages new bits to create the parts it needs with your old setup to solve no real problem. It could also be keeping a bad root statement and perennially dropping it into every new boot config. Yay! I don’t remember what it was and I’m not at work, but I’ll try to check later and see if I can offer some help.