[appengine:update:version] Version override to update war doesn't have any affect

What steps will reproduce the problem?
1.  Use the maven plugin 
(https://developers.google.com/appengine/docs/java/tools/maven) to update war 
to google app engine. Set the appengine-version.xml to 3.
2. In the project appengine-web.xml the value of version is
  <version>3</version>
3. command executed :
mvn appengine:update -Dversion=4

What is the expected output? What do you see instead?
Appengine dashboard should show that version 4 got uploaded. In my case a 
version 3 had been uploaded before sometime back and a version 4 had never been 
uploaded. However after the command executes successfully, when I looked at the 
appengine dashboard, no app version 4 showed up. However version 3 was 
overwritten and next to it, it says: Deployed 0:00:19 ago by xx@xxxx.com

Today I thought I could be supplying incorrect command line arguments.
I tried the following but the result was the same:

mvn appengine:update -Dappengine.update.version=5

What version of the product are you using? On what operating system?
OS name: "mac os x", version: "10.7.5", arch: "x86_64", family: "mac"
Maven : Apache Maven 3.0.3 (r1075438; 2011-02-28 09:31:09-0800)
Java version: 1.6.0_43, vendor: Apple Inc.
appengine-maven-plugin : 1.7.5

Please provide any additional information below.

Original issue reported on code.google.com by a.ta...@gmail.com on 17 Mar 2013 at 9:32

Merged into: #14

faresd / appengine-maven-plugin

[appengine:update:version] Version override to update war doesn't have any affect #18