Can't Get App to Recognize "A" as the First Letter of a Sentence

Most of the time when I start a sentence with “A,” as in “A man is seen,” it either recognizes it as ‘the’ or ‘they,’ depending on how distinctly I try to pronounce it. I’d say it works correctly < 50% of the time.

Is there a way I can train it to my voice to better recognize this? Otherwise, it seems to be about 90-95% correct. My only other complaint would be that it occasionally capitalizes random nouns for no apparent reason.

Any help would be appreciated. Great app.