Ever been confused about the past tense of the word 'dive'? You'll see it in literature as both 'dived' and 'dove'.
The truth is that both are correct. Purists from Britain will argue that only 'dived' is correct, and that is the form you will see there. In Canada you will see a mix of both. The US mainly uses 'dove', and this latter form has been in use for well over a century.