SSDT-BI SQL Version Compatability
I would stop using VS2013 for SSIS 2012. It builds SSIS 2014 packages that can't be deployed to SSIS 2012. Instead install SSDT-BI for VS2012. 

Another option is installing SSDT preview for VS2015. It is a currently a release candidate for SQL 2016 but is able to support downlevel versions back to SSIS 2012. So the story will be much less confusing soon (or now if you are willing to use beta software).