Hermaphroditic Corn Ears

[Elizabeth]

I have planted corn before, but this is the fist time I have seen hermaphroditic ears. I have an oddball ear like this on 2 plants so far (most ears seem normal). The variety is Early Xtra Sweet F1 from Thompson & Morgan. These are first gen from T&M, I didn't save seeds from a previous crop.

They started out looking like regular ears, then I saw something odd shaped under the husks, then a couple days later the pollen spikes broke out of the husks, exposing the kernels as you can see in the pics.

Is this normal on the newer sweet corns to have a few aberrant ears?