I think I got that wrong about being able to see a full moon during the day, you're not supposed to be able to see a full moon during the day under the RE model, correct?
Pretty much, yes. In reality, a "full moon" isn't exactly full (if it were, it would be in eclipse). For that reason and a few others, under the right circumstances you might see it for a few minutes while the sun is also up.
But I can't find any information on the internet about the RE model explaining how I can clearly see a waxing crescent moon at mid-day. Everything I have read thus far says it should only be visible in the western sky at twilight and beyond. Is this correct? I say it this morning in the eastern sky as well. Clearly visible. What is the RE explanation for this? TIA
Crescent moons are dimmer than the "fatter" phases so they're harder to see in the daytime sky. The really thin crescents are very hard to see while the sun is up since they're dimmest and in the brightest part of the sky, close to the glare of the sun. As you see today, the moon is bright enough to be easily seen in the daytime sky about 75° away from the sun.