Redmine

When I add one attachments or files it add mutltiple files. Screenshot ilustrate this.

Environment:
  Redmine version                2.5.1.stable.13087
  Ruby version                   2.1.1-p76 (2014-02-24) [x86_64-linux]
  Rails version                  3.2.17
  Environment                    production
  Database adapter               Mysql2
SCM:
  Subversion                     1.6.11
  Git                            1.7.1
  Filesystem                     
Redmine plugins:
  redmine_agile                  1.3.1
  redmine_documents              1.0.0
  redmine_importer               1.2.2
  redmine_loader                 0.3b
  redmine_mylyn_connector        2.8.2.stable
  redmine_testlinklink           1.0.0

Plugins:

Redmine Agile plugin (PRO version)
Scrum and Agile project management plugin for redmine
http://redminecrm.com
RedmineCRM    1.3.1    Konfiguruj
Redmine Comfortable Documents
This plugin improve of visualisation list of documents
https://github.com/darioo/redmine_documents
Kowalski Dariusz    1.0.0    
Issue Importer
Issue import plugin for Redmine.
Martin Liu / Leo Hourvitz / Stoyan Zhekov / Jérôme Bataille    1.2.2    
MS Project/Redmine sync plugin
MS Project/Redmine sync plugin
Simon Stearn, Andrew Hodgkinsons    0.3b    Konfiguruj
Mylyn Connector plugin
This plugin provides a webservice API for Eclipse Mylyn (RESTful)
Sven Krzyzak / Daniel Munn    2.8.2.stable    
Testlink Link plugin
Links the test case, the project and so on from Redmine to TestLink.
http://www.r-labs.org/projects/rp-testlinklink/wiki/TestLinkLinkEn
M. Yoshida    1.0.0    Konfiguruj