"Mangle" Druid skill not available after lvl 58 Boost

The “Mangle” Skill/ Ability is not appearing in the list for the boosted Tauren Druid. The trainer says it is learned but I’m unable to find the Skill/ Ability to place on an action bar for use. The next lvl for this primary damaging ability to be learned from the trainer is 68. I do hope that others haven’t faced my same dilemma after paying $39.00 and appreciate any help on the matter.

Thank you,