There is an issue with clustered environments of Connections 3.0.1 where the Daily and Weekly emails are sent multiple times (once for each node in the cluster). This issue existed in 3.0 (See here) however was resolved with and iFix LO60006 however the same problem exists with 3.0.1.
Upon downloading LO60006 from Fix Central and trying to apply it the update installer indicates that it is not a supported iFix on 3.0.1.
With a little assistance from my good friend Dave Hay I was able to find out that a version of LO60006 existed however you need to request it specifically from IBM via a PMR. Simply tell them you need the 3.0.1 version of the iFix and they should email it to you.
Once the correct iFix was installed problem of Duplicate emails was resolved!