I had an experience with a daylily changing dramatically several years ago. When I first purchased Banned in Boston, the first few blooms on it didn't look anything like the bloom should have. In fact I thought I was sent the wrong plant. After about a week of blooming it finally got it right. Look at the differences in these pics.
BANNED IN BOSTON (first few blooms looked like this)
BANNED IN BOSTON (blooms after about a week)