I think I understand this contract, but I am not a lawyer.
The Barton Law Firm helps employees understand and negotiate employment contracts and sues employers for breach of employment contracts.
Here are legal citations and information you might find helpful:
Employment contract interpretation is generally governed by state common law, statutes, and case law.
RCW 49.36.020 (Employment contracts);
RCW 49.44.170 (Unfair practices - public employers);
WPI 301.05 (Contract interpretation).