Thank you for your bug reports.
The Build process that requires the pull of the files when they shouldn't be pulled, can be reproduced after you open the second project after the work with the previous one.
I kindly ask you to restart the IDE and repeat the Build process for the necessary files in your project.
If the issue during the pull is reproduced after this. please send us the bug report from the IDE repeatedly.
Our developers are working on the issue related to the building process.
As for your question related to the TFS and MSSCCI, none of this is not used in The Welkin Suite.
The TWS IDE has no TFS integration.