Are you sure that you didn't set the upper lumbar support bladder at full inflation? If you did, yes, upon startup, it will inflate to the memorized setting.
Did you try moving the lumbar adjust to the upper air bladder and deflating it?
The switches in conjunction with the lumbar are confusing....
Each press up on the "+" button puts you at a different lumbar air bladder level. You then use the "-" button to inflate or deflate that air bladder. I think there are three or four going up the back of the seat. Try that and see what it does.
Hope that helps!
Mark