I would assume that most decent WP programs are like Word, in that you can elect to have the "AutoCorrect" function "fix" "two initial caps." (Tools - Autocorrect and check the box.) You can also check the box for "correct accidental Caps Lock."
With this second function turned on, if you use the shift key with the Caps Lock turned on (so that you'd get something like "wITH THIS ..."), it will automatically change everything to lower case, Cap the first character, and turn off Caps Lock.
Also, if you find that you've accidentally typed a bunch of shouts, (in Word) you can highlight (select) text and use Shift-F3 to cycle through "all lower case," "Initial Caps On Everything," and "ALL CAPS" until you get what you want. (You may have to change your selection to zero in.)
But if duct tape and bailing wire works, by all means use it.