Stupid autocorrect

[Stealthpolarbear]

Why change 'onto' into 'into'
Is onto such a rare word?
Have I got it wrong -should it be two words?

T

I have a colleague called Ray Walker and my ipad frequently changes his name to Rat Wanker.

I just want to know why, with all the stupid wrong auto-correcting my phone does, can it not figure out that an I on its own will always be a capital letter?