I have the same situation here. lol it's confusing.

You should go on your Uscis Account if you have one, if not you can create one on uscis.gov Every time you receive that email is because Uscis update your case, send some receipts notice...

you must have received an RFE

they didn't updated my uscis account..

@Mitch Any update on your case ? did you find anything about your rfe ?