Well, I'm not a pro when it comes to Spike, but I think the purpose of spiking every week is to rev up your metabolism. While I understand that you're frustrated about not losing as much as you'd like, you might lose even less if you do it only every two weeks because your body might go into "starvation mode". Remember, during the week you're already eating LESS than your RDI, so - in my opinion (and I might be wrong) - doing this for two weeks may actually have a reverse effect as your body may be holding on to everything you eat. I haven't looked at the kinds of food you're eating, but whenever my weightloss slows down, I limit my sugar and starch intake during the week and it helps a lot! Good luck...
SoLosingIt