Sunflowers - A Conundrum

I planted sunflower seeds.

They bloomed, sunny and happy, showing their changing colors as the chlorophyl wanes,

and the petals droop and fall off.

They are sunflowers.  They are supposed to turn and face the sun, right?  

Well, somebody forgot to tell mine.

I took these two hours after sunrise, two weeks before the solstice, and the sun is as high as it gets. 

But it's only in one place.

My flowers don't seem to have gotten the memo.

Seriously, those on the right are in the same pot, yet face directly opposite one another.

And then there's this fellow, all alone, standing straight up because obviously making a decision in this situation is just too stressful.

It's a conundrum, for sure.