The "Switch all power to front deflector screen(s)" line is actually correct like it is. The reason it sounds like "screens" is that they replay the line without a gap = "Switch all power to front deflector screenSwitch all power to front deflector screen". At least that's what it sounds like to me.
Take a listen to the lines in the mono mix and you'll hear it, it's also how it appears in the published script.
Another one is "We're passing through the magnetic field" Could be "We're passing through their magnetic field" that's how it appeared in the published/forged script which are more or less based on the dialogue in the film not the other way around, but if you cannot hear the difference it doesn't really matter, I cannot, these are also such trivial things that it doesn't change anything important being one way or the other.
A funny Threepio line that is missing is his response to Owen's "Shut up" where Threepio answers "Shutting up, sir." I can see why CatBus omitted it, as readability is always more important, but here's how I handled it when I did my own a few years ago:
119 00:17:49,200 --> 00:17:50,568 Yeah, all right. Shut up. I’ll take this one. 120 00:17:50,633 --> 00:17:51,934 -Shutting up, sir. -Luke!
00:17:49,200 --> 00:17:50,568
Yeah, all right. Shut up.
I’ll take this one.
00:17:50,633 --> 00:17:51,934
-Shutting up, sir.