Issue with Removing

Hello, i have a little problem with the symmetry, i dont know if im doing something wrong or it just could be the plugin after all. i did indeed reinstall the plugin and removed the json file and the issue was still there. when placing down triangles or squares out sideways and when im trying to delete a foundation, it gets messy like in the video.

its also happening when you center a triangle foundation

Think plugin might be dead - no longer avaliable for purchase. RIP 

oh no, it was actually a good plugin.