I have Joseph Smith's "JST" (Joseph Smith 'Translation' of the Bible), which BTW, isn't a "translation" at all as Smith knew very, very, very, very little Hebrew or Greek. IoW, it's an editing hatchet job, coupled with a weak attempt on a few verses to try to develop a "running commentary" by ADDING some words to change or add to the meaning as stated in those verses.
Now, when we turn to the book of Revelation in the JST, we see, for example, that in Revelation 1:4-5, Joseph Smith ADDED a LOT of words just to those two verses alone! Compared to the KJV, Smith added 22 words to Rev. 1:4 & another dozen words to Rev. 1:5...That's 34 words in just two verses!
By your very own admission -- J.A. -- where you said: "Anyone who ADDS TO...the Book of Revelations is condemned to suffer the plagues mentioned in that book."
Smith did exactly that!
At other places in the book of Revelation, Smith did exactly what you said would be problematic, JA: Smith "took away" the river reference, for example, in Rev. 9:14 in his "JST" version of the Bible. Rev. 9:1 references "bottomless pit" -- so Smith decided to extrapolate "bottomless pit" from v. 1, took away "River Euphrates" in v. 14 -- and replaced it with "bottomless pit" in v. 14.
How is a river a "bottomless pit?"
Good luck on getting any answers from our FR Mormons.
They appear to have slunk away from this thread.
I guess the doubts have overcome them like they do SO many Mormons when faced with the FACTS of their chosen religious organization.
Oh for the boldness of the poorly informed porch folk!