No this is not a problem about routing the wrong way or climb cutting. Rather, I am having a problem routing a 1/4 inch groove so I can install 1/4inch plywood for the bottom of drawers I am making. I have had this problem on two different router tables with separate lifts so it is not the lift or the table. The problem is that I am using a two flute 1/4" shank bit and it wants to lift up as I make the cut. That is, say I start off at 1/4 inch depth by the time I am at the end, say 15 inches, the depth is not 3/8th or greater. Is this an inherent problem or am I doing something wrong?