Because there are no space characters in the filenames and there are not too many files we can use "ls" to sort the files by timestamp:
ls -1ctr $(find /backupMWS1 /backupMWS2 -mtime -1 -name...
What Operating System and version are you running?
What filesystem type hold the files (e.g.ufs, vxfs, LVM, zfs ...)?
What Shell do you use?
What backup software are you using?
What do you...