The rulebook says:
Item 4. Unsportsmanlike Conduct. An attempt to call an excess team timeout or to call a second timeout in the same dead-ball period by Team B in an attempt to “freeze” a kicker, will be considered unsportsmanlike conduct and will subject the offending team to a 15-yard penalty (See 12-3). This will apply to field goal or Try attempts.
Note: If an attempt is made to call a timeout in such situations, the officials shall not grant a timeout; instead, play will continue, and a penalty will be called, with customary enforcement. If a timeout is inadvertently granted, the penalty shall also be enforced.
As I read that, the fact that the refs stopped the clock as a result of Seattle's requesting a second consecutive time out when they shouldn't have done means the unsportsmanlike conduct penalty should have been enforced. What am I missing?