Method:
1. Create a new multi-configuration project
2. Add a user defined axis "server" with value "192.168.1.100"
3. Add a user defined axis "port" with values "8080", "8180"
4. Add a execute shell build script.
===
if [ $port -eq "8180" ]; then
exit 1
fi
===
5. Save
6. Build Now
7. Click on the build that was just executed

• Console Output:
  ====-
  Building on master
  Triggering 8180,192.168.1.100
  Triggering 8080,192.168.1.100
  8180,192.168.1.100 completed with result FAILURE
  8080,192.168.1.100 completed with result SUCCESS
  Finished: FAILURE
  ====-
  8. Click on the configuration that failed (8180,192.168.1.100)
  9. Click on Matrix Reloaded and rebuild the failed configuration (only that should be selected by default)
  10. Click on the build that was just executed

Results:
Both configurations were rebuilt.

Expected:
Only the selected configuration were rebuilt. Other was skipped.

Notes:

• Failing the configuration is not required to show this problem. Was able to see the same behavior if any builds were selected (failed, successful, mixture, or none).