There is non-standard behavior of log-store "address" in jboss-cli.

If you want to change log store type via jboss-cli I suppose that supposed way is via command like:
/subsystem=transactions:write-attribute(name=use-hornetq-store, value=true)
similarly with jdbc store.

But there is a second way how to get name the transaction object store in use:
/subsystem=transactions/log-store=log-store:read-attribute(name=type)

But when you try to set the type via this way:
/subsystem=transactions/log-store=log-store:write-attribute(name=type, value=hornetq)

you'll get operation success
{
"outcome" => "success",
"response-headers" =>

{ "operation-requires-reload" => true, "process-state" => "reload-required" }

}
but no change in the model is realized.

There should be some info to user that this way is not supported or this way should correctly work.