So when Joseph claimed to see both Elias and Elijah in the temple, did he screw up or did he get it right?
Apologists point to the JST calling Elias John the Baptist which would predate this 'vision' as proof that Joseph knew what he was doing.
That said, Joseph made sure to point out that Elias was John in the JST yet in the temple made no so distinction *and* even lds.org concedes that the Elias in the temple was likely from Abraham's time.
Third, a prophet by the name of Elias, along with Moses and Elijah, appeared to the Prophet Joseph Smith and Oliver Cowdery in the Kirtland Temple on 3 April 1836. We know very little about this prophet except that he apparently lived in the days of Abraham and committed the “dispensation of the gospel of Abraham” to the Prophet and Oliver Cowdery (D&C 110:12). The power and commission Elias restored was that of celestial marriage and pertains to the doctrine of eternal increase (see Bruce R. McConkie, A New Witness for the Articles of Faith [1985], 508; and The Mortal Messiah [1979], 1:56–57).
I know it's an old issue that's been talked to death... just curious if anyone's come around to either side over time or not on this.
Personally I think this falls into the same category as the Deutero-Isaiah stuff -- either Joseph was so good at this that he got every nuance right (which is not backed up by the evidence we have) or he sometimes made major errors by not understanding that certain things did not fit together the way he thought they did.