Luke 17 pt. 2 Seeing yourselves, be grateful to Jesus

Continuation of our verse by verse bible study in the gospel of Luke. The lepers who were healed by Jesus were instructed by Him to show themselves to the priest, so why was Jesus expecting them to stay and thank Him after all he told them to leave? Were these lepers wrong for following Jesus' order? What was this special "wholeness" that Jesus spoke to the one who did return? How are we to use this lesson in our lives?