The clone towers are indeed bugged.
The first clone tower i make is in range to manually clone a tower, but wont automatically clone it.
When i build new towers next to the clone tower to test, they are automatically cloned. I build a new clone tower next to the towers i want cloned, and it works flawlessly. So i assumed the auto cast range was bugged. But later in the game i build clone towers and pure darkness towers next to each other, but they wont clone automatically.
I don't know, you're the experts. The replay is a single player game just to reproduce the bug.
By the way, a tower is 2x2 square. How long is a square in "range" measurements? buggy clone towers.w3g