PO games doesn't affect points. So doesn't matter if they are reported together or separately BUT reporting separately has a little more benefits. Matches can be commented individually and we can see which matches you won and which matches your opponent did.
If you want you can report separately and I'll fix the first game by removing the extra replays. Otherwise it's all fine you don't need to do anything.
I don't have a problem allowing to hide countries per se. The thing is, TUS uses countries in various places and I have to go through them all to enable such feature. I'm so busy coding TUS v3.0 and I'd rather make the feature in the new code base than modifying the current code.
Your country flag is your nationality and can't be changed. There will be new field in the future which specifies your current location. (or residency) That can be changed by the user. You gotta wait until then though.