Background:
I have a set of Capybara integration tests running against my Rails 3 Application. For the other parts of the test suite I
For IE webdrive you can run at most 1 test on one physical node! If you want to achieve parallelism with IE webdriver than you can try by add/register more physical node to the hub.
Regarding above screen shot of hub console, it also shows you only one IE icon. The message is wrong that "Supports up to 5 ...." but you can consider number of icon for respective browser displayed below it.