Change of Behavior

I noticed an interesting change of behavior with Wyatt's scent discrimination this morning. When he found the metal scent article on the very first one tried, he picked it up, dropped it and then checked the other ones. He then came back to the first (correct) one and retrieved that. He did the same thing on the leather article. Not sure if it is better or worse. In the past, he would have immediately came back with the first one...