I think that's a pretty normal mind process, rebel8. Past memories usually bring us to more recent memories. I can't think of my favorite teddy bear and how I used to cuddle with it without remembering that it's now missing an eye and up on the shelf.
Some of us who have bad memories that outnumber the good ones work hard at making new memories that are good ones. Especially if we have kids, cuz we want to give them different lives than we had.