What mistake is made when words are incorrectly split into two different words, changing the meaning?

Is there a terminology for when correct English words that are made up of other English words are incorrectly split to use the shorter words out of context?

Examples of the error I am trying to categorise:

• Today I'll wear my everyday shoes. vs. Today I'll wear my every day shoes.
• The weathermen have forecast rain. vs. The weather men have forecast rain.
• An ideal setup would be full waterproofs. vs. An ideal set up would be full water proofs.
• That would give me a headache. vs. That would give me a head ache.
• We won thanks to great teamwork. vs. We won thanks to great team work.
• Always make sure you backup your computer. vs. Always make sure you back up your computer.

Solution 1:

The mistake of splitting a word incorrectly into two different words is quite simply—wait for it—a misspelling. I can think of no sub-class of this error for when a change in meaning is caused.