domain mapping not changing url of attachments

Check http://host-gator-coupons.com

now scroll down and right click on the Digital Ocean logo and check its url.

http://honestparking.com/base/uploads/sites/4/2014/04/digitalocean.jpg

Why is it pointing to main domain? I agree that when creating the post, I was logged in to http://hostgatorcoupons.honestparking.com/wp-admin, but isnt the domain mapping plugin supposed to convert the url?

I did not have this problem with the original domain mapping plugin from Ron/Donncha. This looks like a problem with wpmu-dev's DM plugin.

Can you please check this...