scaling objects cheat won't work properly

So i usually add cars to my sim's house lots and i have recently run into an issue. whenever i try to rescale the objects i'm using (i press Shift+[ or ] so hopefully that was right) it will just lift the object into the air or down again. I'm hoping i am just missing a super easy thing and i was just being a ditz because i really don't want to have to re download anything and take the mods and CC off my game and put them on again. the only mods i have are the mods to remove the blur/mosaic so i can play it more realistically and the other mods i have already removed because they were causing issues.