Big Bird, Cookie Monster, and manmade errors

Maybe the writer for Yahoo! Style is dealing with a funky keyboard with an occasionally inoperable Shift key and a space bar that’s kinda jacked:

Just in case the writer actually made these mistakes intentionally, let’s school her: Big Bird and Cookie Monster are Muppets deserving of being treated as proper nouns. And manmade is one word according to the American Heritage Dictionary, though it allows the hyphenated man-made.