They just delete all the old ones that are rumours, hence the 20 tweets over the past 4 hrs and only a handful of official signings over the previous week.
Any twitter account with the words 'transfer' or 'footie' or even 'football' are all run by pointless morons that make up tedious rumours or worse, relay other tedious rumours made up by other pointless morons. Will people ever learn? If you follow these accounts and then post them on here . ...