[aiharkness]

Waiting and entering and extra space works for me. Just tested in an email. I did it two different ways: double space to automatically add a period and a space, wait, add an extra space; and type a period followed by a space, pause, add another space.

As far as right or wrong, it's style, and one space is the style now. I learned to type before computers, with only two choices of fixed type face (Pica and Elite). The style then, for readability, was two spaces after a period. It is still my habit, but I see that it isn't necessary with fonts nowadays, and I'm becoming happy letting my Z10 work it all out.