Auto Correct spoiling me!!!

Whenever we are writing a mail or drafting a document, If we type wrong spellings auto correct option will help us. I was in traning yesterday. Trainer was showing some template to us wherein there was a word “Heirarchical” in document heading. We were all busy looking at the content of the document. One guy said: Heirarchical has been spelled wrongly. Just to confirm he asked me. It took a second to respell and tell the correct spelling as the trainer was arguing that “Heirarchichal” was correct. Next thought which came to mind to check the spelling in word-autocorrect. Later, realised that auto correct is spoiling my spelling capability!!