So... I've been modeling a Chevy Tahoe, and since I'm fairly new to modeling, I believe I messed something up, and I have no idea how to fix it.

 

Everything was fine, until I was installing a part, and I must have moved something else along with the part, because now... every time I "repair" my vehicle with SNT, my car moves forwards. How do I fix this? Please keep in mind, I'm no expert when it comes to Zmodeler.

How far forward? If it just inches forward, don't mind that. On the other hand, if it moves forward a metre or two, something may be wrong

It moves a foot or so every time I press CTRL + Numpad 1 (for quick repair via SNT)

 

Then if I hold down that key combination, the car slowly slides forwards until I release those keys. (I can take video if you're still not getting what I'm talking about.)