At the beginning of Alma 43:14, the original manuscript reads desenters, which Oliver Cowdery miscopied into the printer’s manuscript as desendants; in other words, he ended up replacing dissenters with descendants. This mistake (a visual error) was facilitated by the similar spelling Oliver used for both these words. Notice that earlier in this verse Oliver wrote dissented as desented in 𝓟 (but which the 1830 typesetter respelled in 𝓟 as dissented ). Moreover, at the end of verse 13, Oliver spelled descendants as desendants in both manuscripts. The proximity of this last instance prompted the error at the beginning of verse 14.
Here we have a clear example where the current text states a highly improbable increase in population. It is at most only a couple of generations since the priests of Noah (the Amulonites) got their start, yet the current text states that by this time their descendants were nearly as numerous as the Nephites! On the other hand, the original manuscript makes perfectly good sense when it claims that there had been so many dissenters over the years that now these Nephite dissenters had become nearly as populous as the remaining Nephites. The original, correct reading thus shows how precarious the situation had become for the Nephites.
Summary: Restore in Alma 43:14 the reading of the original manuscript: “now those dissenters were as numerous nearly as were the Nephites”; here the text is referring to the total number of Nephite dissenters, which includes the descendants of king Noah’s priests.