Miltoniopsis ID
 

I had gotten this little plug with an order of other plugs back in January. It was labeled as a Breathless Florence. It decided to throw a spike and 2 blooms on it. I don't believe it's a breathless Florence because the markings on the flowers do not match. What do you all think it is??

Miltoniopsis are known for variable lip spotting and color. A lot of it is temperature dependent.

I was looking at pictures of the ones the person sells though and it appears it could be a prelapsarian Stefanie. I wouldn't think the coloring and markings would be this vastly different, would it?

Your plant's flowers do look more like Miltnps. Prelapsarian 'Stefanie' than it does like Mltnps. Breathless 'Florence'. Lip details can vary dramatically but base color usually isn't that different. Contact the seller and ask them.