I assume you mean the rubber all-weather mats? I really wish those would velcro or fasten onto the floor the way the carpet mats do.
I haven't had mine slide that far forward. So far, mine only seems to shift to the right as I'm stepping in.
I tried at one point to stick some velcro patches in the correct spots to match what's on the carpet for the built-in mats. But they fell off quickly. I wonder if one could bolt velcro pads on those spots somehow?