To the best of my knowledge no that should not be the case if your profile name is changed and then you change it back to your name again you should not lose anything. I personally have about 4-5 profiles set up in my EMO app, (all the same name) as sometimes EMO won’t recognize me if I’m wearing a hat or if I have my headphones on etc. So I’ve introduced/scanned myself a number of times, this way when EMO spots me he knows who I am and so far he is fine and has not reset or forgotten anything.
This is also something that was also discussed (on a number of forum posts/threads one being the features thread as well) where it would be good to have EMO scan you multiple times in the one profile so he better knows who you are when he spots. you.
But as mentioned, he should not forget/reset any sort of knowledge if you simply just rename your profile back to what it originally was.
I believe the only thing that EMO will forget will be your birthday, if you delete your profile and remake it, then the next time EMO spots you, he will ask for your birthday again. So far profile settings are quite basic at the moment.
Hope this helps 