Yeah.... the "new moon" appeared in 1981... that makes the most sense. That's why none of the laserdiscs match the GOUT (they're all using the '81 version).
The SE reverted back to the '77 moon, just like they reverted back to some of the old '77 sound effects, and the '04, as it changed so very little, simply carried this over. Mystery solved!
The GOUT is "altered" in the sense that it's using a mixture of the theatrical soundtracks, rather than the original 3 for each film individually.