Correcting spelling/grammar/punctuation is fine. None of us are perfect, and this site allows people to make those kinds of corrections.
If you see a page where Ninjoy and Nye are listed and neither are in alphabetical order, then yes, fix it.
If Emmlette appears in a group for a game she wasn't in, remove her.
If a badge is missing from the ingredients page, add it. Don't be alarmed if another editor makes a change to it due to the wording.
Personally, I wouldn't mind separating the HD and To Go! sections for the customers who order them, but in many cases, it's too repetitive. So leave it alone for now. We may bring that up at another time.