in mw2's console i can type /record (name of demo) but now after it updated, i can no longer view the demo by doing /demo (name of demo). Anyone know why :?:

/demo demoname;wait 5;demoback 1 ... lost connecting to host it's write this me

You have to end the demo with /stoprecord before the map ends or it corrupts the file.

And some combination of demo, wait, and demoback are probably going to be needed. Just keep messing with it.

Do i have to stop recording before the end scores show up?

Do i have to stop recording before the end scores show up?

yes.