Due to the huge submitted apckages, the USCIS is short of officers to answer all the phone calls asking about status. Instead, the USCIS redesigned their website and the system will be cheating everyone who try to check their status. Every time you ckeck your status, the system will automatically create a message as if your status has just been updated, as if they are really busy with all the submitted packages. If you do not check they may just steady still. You can try again tomorrow and again and agin.