Flickering a permanent enchanted with Reality Acid incorrectly makes you sacrifice it

When using aminatou, the fateshifter to blink animate dead which was attached to deepglow skate (mine), and then returning wurmcoil engine (opponent) and resolving the return trigger first it sacrificed the wurmcoil engine instead of the deepglow skate. Resolving the sacrifice trigger first would not sacrifice anything. In a later turn I blinked animate dead again with aminatou, the fateshifter to return deepglow skate but did not get the enter the battlefield trigger from deepglow skate, even after redoing the turn.