When specifying an order for the deployments they will be deployed in the correct order.

However, the undeployment isn't in the reversed order:

1.
10:32:01,934 DEBUG [EmbeddedJCA] Deploying: /tmp/jdbc-xa.rar

[snip]

6.
10:32:02,143 DEBUG [EmbeddedJCA] Deploying: /tmp/h2-xa-ds.xml

[snip]

13.
10:32:02,238 DEBUG [EmbeddedJCA] Undeploying: /tmp/jdbc-xa.rar
14.
10:32:02,242 DEBUG [EmbeddedJCA] Undeploying: /tmp/h2-xa-ds.xml

The test case is attached.