Idaho license fees - what am I missing?

[Kent]

I just read that the Idaho license fees are increasing for nonresidents. 

"Most nonresident hunters, anglers and trappers will pay higher prices for licenses, tags and fees starting Dec. 1. Price increases will vary by item, but here are new prices for some of the most popular licenses and tags for adult nonresidents:

• Nonresident combination hunting/fishing license increase from $240 to $264 
  
• Nonresident hunting license increase from $154.75 to $185 
  
• Nonresident fishing license increase from $98.25 to $108 
  
• Nonresident deer tag increase from $301.75 to $351.75
  
• Nonresident elk increase from $416.75 to $651.75
  

Nonresidents cannot buy 2021 hunting, fishing or trapping licenses until Dec. 1, however, they can buy three-year licenses at current prices, which will be valid through 2022."

So, as I read this, I can purchase a three-year license, before Dec. 1st, and of course I would need to pay for three years and it will only be valid for two years!  Under what circumstances does that make sense?  What am I missing?