A few bugs/ oversights with the "Classic" weapon roster

I love the option, but in my playthrough I noticed a few errors and oversights. At the beginning of the level "Deadly Designs", the first enemy you see drops an M1 Garand, as well as the air drop in the third level, "Forest Compound."
Another issue is also near the beginning of Deadly Designs; if you kill the grenade soldier quick enough and he drops it, there is no seemingly no world model; drops a buggy X Y Z axis display.