The Springening Unachievable Daily Mission

There is a daily special event challenge “Defeat 15 Spring Camel Zombies,” however none of the camel zombies I defeated on level 2 or 9 have been counted towards the quest. I remember this being an issue with this specific zombie type in previous events. Please fix this or provide everyone with some event currency at the least.

Also please make sure that enough zombies spawn to accomplish these challenges. At least twice during this event have I noticed that the game will only spawn 2 or 3 of a specific zombie, but the challenge will be “defeat 50 (or more) of X zombie type.” This makes it impossible to achieve the goal even when I purchase the maximum amount of extra energy.