You deploy releases rather than directly deploying the built war. If you don't create a new release, you're releasing old code.
This covers both live and test deployment.
- log in to Bamboo
- go to the plan of your choice - select the project rather than the environment (eg Deploy LMF to Test rather than Deploy LMF)
- create a release (button in the top right)
- run the deploy environment (cloud icon middle-right of the page)
Unless you've killed the server, you're done.