@dave0538, first things, first. Please go to your "Profile" page and put your location. I know you said
"Atlanta", but if you'll list that (and the USDA zone) in your profile, this will show when you post. Often, folks won't take the time or know to go back and read your initial post.
You are really, really lucky to have so many stems on such a young plant. In fact, I'm not sure you have a single plant or multiple plants. I have a 30 yr. old fiddle that has 14 stems, but those stems multiplied over a 20 yr. period. My tree is now outside in Vero Beach, FL (she grew in NE Mississippi for her first 25 yr.). When I removed her from her pot and put her in the ground 3 yr. ago, she was about 7' tall. She's now about 25' tall. But she was acclimated to full sun, and the fact that she's in-ground, makes all the difference in the world.
You can certainly remove stems as you wish, and they may or may not regrow. Even with so many stems, it's no big deal to cut her back whenever you need to. While in MS, having to bring my plant inside every fall, my fiddle was cut back a foot in the spring and then another foot in the fall, just to be able to get her through a doorway. She came inside in early November and then went back outside in late March. She was in a 30" diameter pot and was in that same pot for 15 yr., before going in-ground when I moved to FL. She was so root-bound that I had to destroy the expensive composite pot to free her.
The photo was taken 10/30/2020. This tree is now about 10' taller.