The motor ran the wrong direction for about 30 minutes when it was first
installed 2 years ago.

It HAS been running the right direction.

I only asked because the first thing the HVAC guy said yeaterday when he
came out that the motor needed reversing.

HE WAS WRONG....end of story.

I have other issues with it but I'll get to the bottom of it.

End of story.

Why is that an HVAC "expert" (who got me for 300 bucks) is not familiar with
the "blow through" coil design?

Albeit, they are not commonplace, BUT --

"a fair question".

and a ****er, I might add.