Shannon, she knew. :0) I use to work in a store that sold apparel and intimates. There and still is a lady or two who use to go to stores on a one day bra fitting. I knew the girls who worked in intimates and they told me that they could spot a trans person a mile away. They would never say a word, it is unethical. Don't let this scare you, by all means do what you have been doing as it works for you.
On the subject, I have found so far the front closure works best for me. For one thing its not as hard to clip as my shoulder sometimes goes out of whack and will hurt for days. Then there is the feeling that it pushes everything forward. I thing that is my imagination, but I'm going for it and it is my story. It makes me feel better. So don't tell me any different. LOL
Sheila