Traceabilty Report Filter

Hello,

When we create a TestPlan TP with 3 Tests T1a,T2a,T3a.

The Coverage is : 

• Req1 : T1a & T1b
• Req2 : T2a
• Req3 : T3a

When we trace the report, filtering on the Test Plan, the Test T1b is shown**, although it was not included in the Test Plan.

How can we exclude it ?

Thanks