Currently Test Studio uploads the project files to the storage server only if the files are newer than the files in the storage. This could lead to problems if you have several branches of the same project. 

The only fix that I can come up with, is to create a new project for every branch and rename it.

It would be more useful to have the possibility to force upload project files to the storage, even if they are older. Just a simple checkbox to force upload this. Or maybe even better if the storage service can differentiate between the projects by parsing more of the directory names.