wierd 3 1/2 gear

so my car is a 2005 sedan 5 speed wait im sorry 6 speed yeah thats right 6 i have a 3rd and a half gear its no mans land has anyone else ran into this it you put the shifter into 3rd then lightly push on it like your putting it into 3rd and it clicks over its third and a half it this happens while driving down the road during a high rpm shift and i let off the clutch it doesnt grind but you have to take both your hands and yank as hard as you can to get it back out can post a video on youtube if need be