Beginner Gardening: What happened to my delphinium???, 1 by Sneirish

Sneirish wrote:
I planted what the tag said was a small Chinese Delphinium "Blue Mirror" in the summer of 2006, no blooms, but it grew well. Last spring it bloomed a beautiful cobalt blue, but then no repeat blooms. In late summer I had to move the plant to another garden spot in my yard, and it seemed to settle in and grew well. Well, it is just blooming now and it is a gorgeous bright PURPLE! Other than transplanting, I have done nothing else to it. Unfortunately I do not have a photo from last year, Spring 2007, but here is the photo right now.
Is this really a "Blue Mirror" - or is there maybe something in the soil there - it's where my beautiful dark periwinkle blue hydrangea grows also.