Too many skulls

Please check the known issues list before posting a bug.

Note: If you are uncomfortable reporting your bug publicly you can privately message @Cyrup or @Kafka with the completed bug template.

Platform, device version and operating system:
Windows 8, pc, Steam

Screenshot or image:

What you were expecting to happen, and what actually happened:
The AI has been able to make skull matches in 24 of the last 30 turns with no bonestorm or doomstorm in place. The skulls are falling at a rate far greater than the rest of the gems.

How often does this happen? When did it begin happening?
Just began at the higher levels of the tower eliminating the effectivenees of any barriers, compounded by the fact that brown gem matches have suddenly become unavailable.

Steps to make it happen again
?

Which troops were you fighting with and against?