Wampa "Cornered Beast" Text error

The Level 8 for "Cornered Beast" reads: 
Wampa has +10% Counter Chance, +5% Health Steal, and +5% Offense for each Damage Over Time effect on each enemy

Which implies it should increase the previous Counter Chance value to +60, but instead it reads:
Wampa has +50% Counter Chance. Wampa has +10% Counter Chance, +5% Health Steal, and +5% Offense for each Damage Over Time on each enemy.