Opponent and I both had the card, “Joshua, Phoenix’s Dominant” in play. Opponent activates the ability to flip their Joshua. On my next turn, I also flip my own Joshua. When opponent adds their last lore counter to the saga side of the card, both his Phoenix and my Phoenix were exiled and returned to the battlefield as “Joshua, Phoenix’s Dominant” under his control. He got both etb triggers and then chose to sacrifice my Joshua so it ended up back in my graveyard. I do not believe this should have happened this way, his saga adding its third lore counter should not have exiled my saga and returned it to the battlefield under his control.