Here we have two minor losses in later 19th-century editions of the Book of Mormon. In the first case, the 1858 Wright edition accidentally omitted the adverb now from “and now when the Lamanites awoke”. In this case, the subsequent 1874 RLDS edition followed the 1840 reading, which had the now.
The second case involves the loss in the 1892 RLDS edition of the subordinate conjunction that after the verb saw. Once more, the subsequent RLDS edition (1908) restored the correct word (probably by reference to 𝓟, although in this case the 1874 RLDS edition would have also worked).
Summary: Maintain the original words now and that in Alma 62:24 since they are found in the earliest extant text (in this case, 𝓟).