[Wayne A. Pflughaupt]

I thought the point was to get it close to the SPL target.
I may be doing more equalization than necessary.

If you’re equalizing across-the-board response down (or up) to the target curve, then yes, you’re doing too much equalizing! If you get a plot like muzz's top one, you can turn the sub down and run REW again, to get in range of the target curve before equalizing. That's mainly to make it easier to track the curve, however; if you can smoothly EQ above or below the curve, then go right ahead!

Regards,
Wayne