Family Safety bypassed by pressing the shift key

I've been banging my head against a wall on this for a month or so. I'm running Windows 8 Pro on two computers. Family Safety was somehow disabled on my kids' accounts on either system. When I logged in as them, Family Safety worked. It also worked on a test account. I finally discovered that if you hold the Shift key down after logging it, Family Safety does not start, so filtering, curfew, time limits, etc. does not take affect. Is this a "feature?" Is there a work around, because as of right now, there is no safety in my house.