I fail to upload the attachment to this bug:http://www.cocos2d-x.org/issues/2614\#
So try to describe it clearly here.
Here is the patch against cocos2d x 2.1.4:
cocos2d-x-2.1.4-asym-iso.diff.zip (0.7 KB)
The asymmetrical isometric map file (10x1).
The snapshot of the test project to show asymmetrical isometric map rendered with wrong position.
And the snapshot of the test project linked with the patched cocos2d x.