I can confirm that certain rows dont get updated instantly (using external plugins), but normally if i do something in the library (open a book, add a new book or whatever), the affected rows get updated.
I dont use emblems, so this "problem" could be something different.
Maybe your row #lastopened is "malformed": Look inside the row settings, if that row only contains the date without hour, the row only gets updated once a day...
My setting is german view, set yours according your language
