LibreOffice Calc not appearing in launcher

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http://askubuntu.com – There is a problem with LibreOffice Calc (and sometimes gedit too) that when I open a file the minimize, maximize and close buttons in the upper right corner are not displayed. Not only this but in the launche the icon for Calc does not appear. The only way right now I have found to at least get the icons in the top right corner when the problem arises is to open another windows and then go back to Calc. Still in this solution the launcher does not show a Calc icon. How can I trace the problem or solve the problem at hand. Already up to date with everything. The only 2 PPAs I am using are w (HowTos)