Spending 1500 Diamonds to get Special Aircraft Blueprints

Has anyone noticed that I got tier 1 black huey gunship blueprints in the special aircraft spin, which cost me 50 diamonds and normal blueprint spin (30 Diamonds) gave me tier 5 and 6 aircraft that I can't understand. I will show you guys upgraded weapons and aircraft/gunship in my next videos. #gunshipbattlediamonds #gunshipbattlegold