Is there anything unusual that happens once in a while in Gmail address box?

Well, one thing it does is try to do a pattern match to see if the name you are typing matches someone in your contacts. If it does, it offers that full email address to save you typing rest of it.

Other than that, you need to be more specific.

elbanditoroso I mean unusual and bad, for example could it change the small letter into capital letter, or , remove the ­…. part? I’m just guessing,

@elbanditoroso Ok, it’s not a problem, it’‘s supposed to be that is just the way some professionals want it to show up.