equinox question

Today was the vernal equinox.
According to my understanding, this is a day on which the sun rises
and sets approximately due east and west and takes approximately 12
hours to make that trip. But Starry Night pro and a couple other
databases tell me that Sol rose at approx. 05:55 and set at approx.
18:04. The closest to a 12-hour day was on March 16.
My intuitive sense of this is that latitude should not be a factor. Am
I wrong in that assumption?
What am i missing?

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