Email issue with activity

Hi,

We are having issue with Email with activity in EIC.

We can receive emails to EIC inbox and once it processed it allow us to create activity and there is no problem but same email it attached to different activities also(it is happening for one user only).

In general scenario one email attached to one activity (once it is processed and created activity , it delete and I can see that

Any help on this?

Thanks,

ravi