Animation mistake?

I woke up with my wig sticking to my head because of the moister from yesterdays tears.the radio was playing "Gone Forever" sa pamamagitan ng three days grace."So I'll stay up all night,with these bloodshot eyes while these walls surround me with the story of our life..."i sang along but trailed off. what was i to do now that i knew that i had killed my perfect enemy? my arch enemy? i curled up on the bed, thinking. i listened to the song and wished I could be glad he was gone forever. but i could only find one reason to be happy: he couldn't expose us."and now your gone forever..." sang cupcake from downstairs.I...

"Kat! What is the meaning of this!?" Zim yelled. "You should be proud of me!" Kat said.
"But now we're going to have these miniature Kat's running everywhere!"
"Face it, Zim! I'm growing up! I'm a mother now! Inside these eggs, are fourteen tiny, helpless, lives depending on me!"

Zim decided to let her keep her eggs. One araw they hatched. She only had nine babies, though. Five eggs didn't hatch. She threw them out the window. The names were Crystal, Darkness, Shadow, Star, Xavier, Chi, Kiko, Sparky, and there was one oddball. He was purple, and his name was Horatio. Horatio had his mother's...