dont waste your time on LUD
Don't waste your time on monitoring LUD. As pointed by lots of people, LUD doesn't mean anything. Actually, you can't even trust the online status message. For my case, my online status never got changed until I got the approval notice.
So my suggestion is to forget about all the LUD, online message, if your receipt date has passed the current 485 processing date, then call the 800 for an inquiry if you are really worried.