Thanks for all the input. I've driven it a couple more miles while watching for more leakage but so far, so good. I must have had it overfilled, but it still reads the correct level. I probably only lost a few ounces of fluid, so maybe it's okay.
Since it was sitting so long, maybe when I topped it off there was an air bubble somewhere that burped out taking some fluid with it. I may never know.
Getting it aligned today, so I can log some more miles and see if the problem is gone. If not, maybe an A518 is in its future.
Again, I appreciate the input.