The drill targets whichever block you tap first, and remains until that block is destroyed. Automine digs automatically when you touch and hold. Smash increases the damge you tool deals. Dynamite damages multiple layers of resources. Splash deals damages to surrounding blocks as you mine.
This means you were playing without an internet connection, or that your connection was spotty, when you picked up the fossil. To eliminate the potential for exploits, we immediately report all oil/fossil pickups to our server without storing them locally. If your device isn't able to connect at that time, the item disappears. It's one of many unideal measures necessary to keep the clan competition from becoming a mess of hackers. Fairness is our top priority.
Please reboot your device completely by holding down the power button for a few seconds and then sliding the slider that appears. If that does not fix the problem, shoot us a message using the form below and we will help you out.