When creating a Functional Test Suite, you are presented with a number of tests to select from, e.g.
The tests listed may not match all tests listed when selecting Tests > Show All Tests from the menu bar:
What causes this difference?
BLAZEMETER FUNCTIONAL TESTING
Tests in a Functional Test Suite all need to be present in the same project. So when presenting tests to include in the suite, only tests in the current project are listed.
If you list all tests from the menu bar, all tests in the workspace are listed, regardless of project. That explains why tests showing up in the suite selection is only a subset of the workspace related tests.