Port forwarding issues

I have a wndr3700 router with 27015 and 4380 already forwarded with udp and tcp. the problem im having is that when i check the ports with a portchecker it says that it’s not forwarded even though it is. I dont know if it has to do with the router or im missing something but i have made a few server before and learned this stuff. my local ip ends in 18 and thats what i put for the port foward adress and still people can join. I have been searching for hours and tinkering with my router and havent found a solution, the most useful thing i could find was this http://forum1.netgear.com/showthread.php?p=239960 , so i decided facepunch is my best bet :smiley: