I can reproduce this problem with NSP GK5 v1.1, Joomla 2.5.9.
To set up my test, based on previous comments, I've done the following.
Search Engine Friendly URLs = NO
Global Configuration > System > Cache Settings = OFF
Menu > Menu Manager: Select all and Rebuild.
Menu > Menu Manager > main menu: Select all and Rebuild.
Site > Maintenance > Clear Cache: Cleared everything
I am using the NSP module in a custom position and doing a loadposition in a Customer HTML module. On a side note, I have reproduced the problem when I change the module from the custom position and put it into a "normal" template position, the problem persists.
The two URL's for comparison are as follow
BAD - from NSP
http://mydomain.com/new/index.php?optio ... &Itemid=21GOOD - from menu navigation
http://mydomain.com/new/index.php?optio ... &Itemid=59In this case Itemid=21 main menu item which is where the module is located, but Itemid=59 is the correct menu.
I've also see similiar issues when the NSP is in Standard Mode, or News Galery mode, if that matters at all.
I will be glad to provide admin access to the site if that will make troubleshooting easier.
Thoughts?