If you schedule a second backup to execute right after the first backup, this backup will start automatically as soon as the first backup has finished.
Example:
BackupJob1 with pre and post routines is scheduled to start at 18:00 (6:00pm). The post routine creates a file in the existing folder \\server1\share1\postbackup.
BackupJob2 only contains backup of the folder \\server1\share1\postbackup (do not select files at file level, select the entire folder, then all files created later in this folder will be included in the backup). This job is scheduled to start at 18:02 (6:02pm) and execution of this job will not start until the first job has finished.
So lets say the first job finished at 23:17 (11:17pm), some 5 hours later, the second job "BackupJob2" will start hereafter.
Hope it helps...
/Nicolaj