The 1849 LDS edition accidentally introduced the direct object pronoun him in the second instance of “they did meet”. Of course, the correct reading is that Coriantumr and Shared met each other in battle in the valley of Gilgal, so him is completely wrong. Note that the immediately preceding clause lacks the him (“and they did meet in great anger”). The 1849 typesetter was likely influenced by the use of him in the earlier clause “and he went against him with his armies to battle”. Surprisingly, this intrusive him remained in the LDS text until the 1920 LDS edition.
Summary: Maintain the original reading in Ether 13:27 without the direct object pronoun him after “they did meet” (in both cases).