Event handler priority in EM

Dear All,

I am having the below  issues for set of  EH for the same BPT.

Scenario:

Say   EH1, EH2,EH3  belong to same BPT  . As I understand there is one-one mapping between AOT & EHT and one-many mapping between BPT & AOT.

All these EH  are configured to receive epics events ( object/aggregation etc..) & having same priority say 10.

Now when an epcis msg is sent to EH1 , some times it executes EH2, EH3.  All these EH are associated with their own EH extension tables.

To trigger the specific EH , we have put a check in pre-post processing BADI  (  if a EH specific extn parameter is passed , then set the corresponding BPT & AOT) but  the EH triggering is  not consistent. so we have to set priority high say 5 for EH1 in order to test EH1 only.

so is there any other means to trigger  specific EH when EH specific epcis msg is submitted. The issue here is if i sent EH extension parameters for EH1, it executes EH2 and ruleset of EH2  tries to update extension table of EH2 which fails.

Regards

Tusar