Sorry to hear you are having issues.
For me, when adding or removing tiles. Its is best to disable the Auto hide feature. Than, adding program or Folders to Tiles is done by just drag from your explorer or from your desktop onto Tiles and release it there. For example if you want to add Chrome into your tiles. Just click and drag Chrome icons on your desktop onto tiles and release it there.
Try it and let us know if you still need our assistance.
Here a demo video on tiles :
Stardock Community Assistant.