For what you are wanting to do, we would recommend using one single repository for your tests rather than separate test suites. Normally when using test suites, you would group tests within each suite that are related to each other. This is one of the main reasons we recommend one repository as this allows you to more easily mix and match your test cases for your test runs.
You can always change a project configuration from suites to a single repository. Keep in mind if you want to do this you will need to consolidate all of your test suites into a single suite by copying your test cases from one test suite to the other. You can also choose to copy the sections you may have as well. Once you do this, you can then convert your project to a single repository.