Why are we still able to read that?

The words are written phonetically which means you pronounce them as they are written not as you have been taught to spell them. I have a child with a disability and a great deal of her written work is spelt just as you pointed out . Yet I can still read it and make sense of it . Maybe schools should look at this method if only to keep kids interested in language.

Because words are more than a bunch of letters put together, our brain see words as pictures and often a word looks right from the brain's point of view as long as the first and last letter is in the right order.

Because while ur lerning to read and talk, ur brain memorizes all the words, sounds, etc. So once ur trying to read sth that is bad spelled ur brain remember the word and u can read it fine.