I originally came across this issue when testing out the workaround for JENKINS-12205, but the same problem still occurs even when the xunit plugin is disabled.

This seems to be caused by: https://github.com/jenkinsci/matrix-project-plugin/blob/master/src/main/resources/hudson/matrix/MatrixProject/index.jelly

The first is the aggregatedTestResultAction, the other is contributed by the hudson.tasks.test.TestResultProjectAction added to the project.

I have little experience with matrix projects, and don't know what the intention behind this is.

Reassigning to Matrix Project Plugin.

Experiencing the same issue, has a workaround been found?
My projects have two Test Results links (both pointing to the same, correct location) and two Test Result Trend graphs.

I'm seeing this occur, too. FWIW, I'm using Jenkins 1.588, xUnit 1.92, and the Matrix Plugin 1.4
Actually, I commented on this issue without correctly reading it first. My issue is NOT related to the matrix project plug-in – I am seeing this with a free-style project. Sorry ...

I have the same issue with xUnit and I confirm that it is not related to matrix project - Jenkins ver. 1.591 - xUnit ver. 1.92

Same here, and without matrix projects at all:

http://integration.moodle.org/view/master/job/20.%20Run%20phpunit%20UnitTests%20(master)/

Both JUnit (pinned) and xUnit plugins installed. Only using the later in my post-build tasks.

Also seeing the same thing, will add that the Trend reports are also Duplicated.
Using Publish NUnit. Jenkins 1580.1 and NUnit 0.16.

I am having the same issue with Jenkins 1.596 and NUnit 0.16, this is without Matrix projects.

Same issue here, Jenkins 1.599, nUnit 0.16 with a Matrix project.

I also had this issue and found that the solution for me was to move my XUnit task from the 'build' section of my project to the 'post build' section.

I already had it in the Post build section only...

JENKINS-26077 tracks the duplication from xunit. mrose claims this is reproducible even using just junit and matrix-project.

After fixing JENKINS-26077 I cannot reproduce this. (Did not try before.)

I can reproduce currently. I am running Jenkins 1.590, junit-plugin 1.6 and Matrix Project Plugin 1.3.

I should mention this is occurring in Maven Project job types for me.

This issue has still not been resolved,
I am using XUnit plugin and JUnit component.
I can see multiple "Latest Test Result" links,along with Multiple graphs.
Also the graphs have no data,where as the test cases can be seen by clicking on the "Latest Test Result" link.
Alson the Test Result Trend has always the latest build number only and is always empty,

This has been resolved as a DUPLICATE, meaning there's another issue that's identical. There's no point in keeping copies around.

Read The Fine Manual: https://wiki.jenkins-ci.org/display/JENKINS/Issue+Tracking