CiviMail reports show open rate above 100%

[tv2011]

I'm reviewing recent mailing reports using the "confirmed open rate". One specific mailing with a small number of recipients (36) regularly shows a confirmed open rate of over 100% - 225, 111, 188, 133, 191 etc. However, when I view the mailing specific report for that mailing, it shows 36 deliveries and only 20 tracked opens. Any ideas why the "confirmed open rate" is off by so much?

[tv2011]

I'm still getting this problem in 4.5 - see attached screenshot. Any idea why some mailings have confirmed open rates above 100%?

[adixon]

I think it's probably counting multiple opens from the same recipient. If you look in the report, you can actually see who is doing the opening.

[tv2011]

That seems likely to me - is it possible for CiviMail to only count unique opens, and not repeated ones?

[Donald Lobo]

yes, can you please investigate and submit a PR to only count the unique's

should be a fairly easy change

lobo