I realize that I have a "two spaces" habit. I have no problem with it. I find the fact that you are so bothered by an extra space after the period to be bizarre.
I imagine because it's larger than the space between words (one space), so as to indicate a break in thought, but not long enough to cause the reading to be stilted.
According to the style guidelines you follow, maybe. But a "typo" is always a mistake, and my use of the double space after the period is very much an intentional stylistic choice.