Question re Campaign Response by Recipient Activity

[Laurence Duffell]

Newbie here. I'm using Community Edition Version 6.0.2 (Build 4217).

We have run several Newsletter and Email campaigns and today I'm reviewing the outcomes. In the Campaign Response by Recipient Activity chart I have values for Click thru's, Opt-out, Views etc. but these values do not match the number of actual entries to be found when clicking on the bar chart. For example according to the chart I have 263 Click thru's yet when clicking on the chart I find only 41.I have set filter to NONE so I believe there should not be a mismatch. See the two attachments.

HELP!