This. There's little substitute for seeing the program write down the wrong text and saying "correct that", then saying the correct number or saying "spell that" and spelling out a word instead.
The good news is, dragon appears to to learn which of the two word variations you use more often and begins to weight its word recognition towards those cases instead.
(I argue a lot with Alexa because she keeps getting stuff wrong even when I enunciate slowly. It is very annoying.)