After a player turns 33 years old, they slowly but surely lose skills. You don't see it until it completely goes down a skill level.
Skill drops are determined by how high of sublevels and skill levels that a player has. Players 33+ years old dropping 2 skills in 1 week isn't new. Just like how players have levels of skills, they also have sublevels that go from .00 to .99 of each individual level. What might have happened is that he could have been at 20.00, then dropped to 18.99, or something close to 19.
If this is the case, then he is technically at 19, but the few remaining sublevels put him at 18. Hope this answers your question.
Last edited by Big Dogs at 5/3/2013 11:31:24 PM