There's usually a 2-3 second (or more) delay from when I swipe to when my LOFTEK moves. Are you waiting 5-10 seconds to give it time?
What URL are you using for the LOFTEK?
Have you tried a wired connection between the camera and router to see if the same problem still exists? If you try this, make sure you temporarily disable the wireless in the camera settings during the test.
Did you assign the camera a static IP address in the camera's settings?
Since you're doing manual port forwarding, did you increase the number of UDP ports by 5 forwarded (in icamsource and the router) for the additional camera?