Stop and think about it for a moment… Wouldn’t it be kind of a sign of instability if you were to have an entirely new list of sins every time you go to confession?
The fact of the matter is that we all have our particular strengths and weaknesses. By the time we’re adults, they’re pretty much written in stone. A wise confessor once told me that “People don’t change - they improve.” What he meant is that I will always have my particular struggles, but if I persevere in struggling against the sins I tend to commit, then I will, over time, improve.
This isn’t to say, of course, that we don’t occasionally go completely off the rails and do somthing out of character. But that’s just the point… it is out of character.
It really makes all the sense in the world that a lazy man will have to struggle with laziness for his entire life. Or that a gossip will have to struggle with the desire to spread tales about others.
I would say that you sound kind of normal. I’d be much more concerned if you were always confessing different things.