Can you possibly expand on your description of the problem? You say the mouse glitches in CoD, what exactly does it do, lose tracking or something? I had this mouse for over a year and had my fair share of problems with it. A few things to check are that you have the latest driver and firmware, you are on a good surface (mine was always fine on an Exactmat, but on other surfaces the tracking was terrible), also check that you arent catching the profile button on the bottom when you move the mouse, as this will make it freeze for around 5-10 seconds while the next profile is applied. If the latter is your problem I would advise turning off auto profile switching in the driver.
Oh yeah, me and several other Razer users I know have had X or Y axis locking (with not just the Lachesis) when the mouse wire is at an awkward angle etc, try slackening off the cable if you get this problem.