Change in Sedirea japonica leaf shape

[camille1585]

Maybe you guys have an answer for me. A bit over a year ago I bought a new Sedirea, sold to me as a Daruma type. It has nice round leaves as you would expect for that type, and the first leaf it grew in my care last fall was also round. Then this spring and summer it grew two more leaves. Strangely enough, both of them are twice as long as the other leaves! Any ideas why? I like the round leaves better!