Ok, one at a time.
First, the problem with covering fire was definitely fixed prior to this.
Second, I don't have that BGM anymore, since I swapped it out. Got deleted immediately after.
Now, don't take this the wrong way, but are you applying the patches correctly? Maybe you placed it in the wrong folder afterall?
Just in case, I made this a while ago to show someone how to do it, as well as checking the new Easy Mode. Maybe take a look and see if you did it correctly.