When using the swipe-style of input that is available as part of the 8.1 update, how do I enter the word "too" instead of "to"? The best I've come up with is to swipe from the "t" to the "o", then click "too" in the suggestion bar, but don't feel that's optimal - I'd much rather swipe "too" directly somehow.
You can swipe consecutive letters by making an uninterrupted "circle" motion on the letter that needs to be duplicated. This may take some practice, but once you get used to it, is fairly intuitive.
So far as I know, this dictionary is "learning" - if you use "too" more than "to", it will automatically type the most used one. But there is no such an option in phone that allows you to customize this.