I never checked for ketosis myself once when I was doing SS. The LL counsellor checked for the first few weeks, but after I changed to CD it was never checked - nor did I want it to be.
If you stick to the diet, you WILL lose weight - no matter what colour the sticks say. Forget them, stick to the diet, concentrate on your goal, and you WILL get there, as quickly and safely as possible. Icemoose did the mathematics somewhere - it is IMPOSSIBLE not to lose weight if you follow a VLCD.
take care, Ann