Lack of saved backups

There seems to be an issue with a recent update. I had originally asked for 28 updates to be stored on my Dropbox for classicandvintage.co.uk and for nawcp.co.uk both of which are long term premiums. There are loads of ancient backups in Dropbox but very few seem to have been entered recently just a lot of very old ones still existing which I believe Updraft should have automatically deleted. It seems that an update at some time has lost the instruction for twenty eight consecutive updates. The only reason I checked was because I needed to check a backup for classicandvintage.co.uk from 24th or 25th March. Fortunately the 25th was there but not 24th. Where have all the rest gone for nawcp.co.uk as well?

I would appreciate your comments.