The crap about altador cup is exactly this. The score will be forever on your userlookup and if somebody clicks the trophy, they can see your scores. That's why you need to be so careful. I sent a wrong result for Meerca Chase 2 a few years ago, because it wasn't multiple of 18, I think, and people on the boards were freaking out. It was under the review score, so I sent another one right away XD
That's what I did recently. I noticed the error and sent another, slightly higher, the same day.