Then why update the PC version if they don't apply?
There may be technical reasons for that, such as keeping the version numbers in sync for multiplayer compatibility. They may also have made further minor changes not mentioned in the changelog that apply to the game on all platforms. Dunno. If you find fault with my technical explanations, do tell - they're certainly speculation rather than fact, but based on many years of experience as a software engineer and writing changelogs.
I merely made the point in my initial reply to post #2 that praising Valve for fixing bugs years after the errors are made isn't justified. It should be expected, and they should have been fixed much earlier.
I think I explained fairly well earlier why those fixes on the whole don't seem to apply to bugs that were introduced years ago but in relatively new code :).