Strange Maintenance Plan SubPlans behaviour: each SP runs all the tasks of all other SP at odd times

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http://serverfault.com – SQL Server 2005: I have a problem with scheduling a Maintenance Plan (MP) with 3 subplans (SP). SP1 is scheduled to run hourly, SP2 daily at 7.00 and SP3 on sundays at 8.00 Reading MP history I see that what happened (I know it seems crazy) is: 11: SP1 runs and executes all the tasks of SP1 SP2 and SP3 12: SP2 runs and does the same 13: SP3 runs and does the same 14: SP1 runs and does the same From the job Activity monitor, SP1 has last run time at 14, SP2 and SP3 are never been executed. All of the SP are scheduled correctly in the Job Activity Monitor (SP2 for tomorrow at 7, SP3 for next (HowTos)