Thanks @Tom W., that seems to have solved it. With mirroring turned off, each data field and its respective label are now oriented correctly with respect to one another. Here is an image:
EDIT: the below issue was resolved within Advanced Viewport Properties by turning off the Adjust flipped text checkbox.
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Unfortunately, when I enter a sheet layer and view the same data tag through a viewport, they are reversed again. Do viewports have separate text-orientation controls?
Thanks!