There two different user task but these two tasks completed by different users at a different level and these two tasks are not parallel tasks. Check following screen shots.
Following info from act_hi_actinst table. In this table KYC Check date created on 15-05-2015 and it showing the end date too.
Following info from act_ru_task table. In this table still it showing in task list.
How this happens without closing the task in act_ru_task table task status get updated in the act_hi_actinst (table).
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