It is possible, based on that information, that the attributes had become disconnected from the sheet values somehow (i'd recommend sweeping your A&A section to look for duplicate attributes). Once duplicates have been removed (or proven to not exist) I'd then recommend deleting the non-updating attributes and reentering that information into your sheet to force the link back to life. Essentially, bar freak occurrences, the sheet values shouldn't ever be different to the attribute behind it since the sheets are essentially just wrappers to display that information in an aesthetically pleasing manor.