Following are the official IPA charts for those who are curious about the difference between alphabet letters and IPA letters (symbols for sounds). An interactive IPA chart can be found here.
The study of sounds truly is fascinating.
After about a half an hour, I finally noticed that the majority of my typos were the exchange of voiced for voiceless consonants and vice-versa.
Though the International Phonetic Alphabet represents sounds not letters, many of the symbols for sounds are the same as letters from the alphabet.
Because most of the counterpart phonemes are not close to each other on the keyboard, I have no explanation as to why this would have happened other than the fact that I have been reviewing the IPA with my class this week.
Picture credit to labnol.org