Hi,
It is probably a combination of two things. One, they were planted last fall, more odd bloom problems seem to happen the spring after planting. Two, the weather has been odd in many places this spring. It was unusually warm for many areas and then unusually cold. This will cause problems also.
I would not worry about the short stems this year. Next year chances are they will look totally normal : )
Remy

Okay, thanks. I won't worry about it too much then. Other than being short, they look healthy.

Their first year, some of my daffodil blooms opened while the stems were short, but they continued to grow taller while blooming. It was weird, but they have been normal since them.