No problem about the q's. :) I remember feeling rather confused and overwhelmed with all the new info, when I first started paleo.
I have no idea whether I'm in ketosis or not as I've never used keto-sticks; my wee is always so pale, they probably wouldn't work (3 to 4l of water).
Mark Sisson says that if you are ranging between 50-80 carbs/day you will enter ketosis as and when needed, I'd imagine frequently at night time; so I wouldn't worry that you're not in ketosis right now.
When I go, intentionally or not, under 20g/day I feel very ill (even after 3 weeks), I can't shift the headache and feel dizzy during and after exercise... I know I would be in deep ketosis. However, I think exercise allows me to be in ketosis (perhaps mild?)at much higher carb levels.
I find fasting much easier with a few extra carbs as it allows me to eat enough calories before bedtime. Yesterday, it worked out I probably had around 20g carbs and no more than 700 cals: the lettuce parcels stuffed with eggs and mayonnaise I had for brunch filled me up so much, I didn't really want or eat much at dinner, but I woke up ravenous 3 or 4 times last night. Luckily there were no cheese or nuts in the house! When I have more veg and/or a bit of fruit I have no cravings/hunger.
Personally, I don't have anything against Atkins, other than phase 1 doesn't suit me and I never loose weight on that phase. I lost a lot weight with just under 100g carb/day- when I was still eating rice, sweet potatoes and quinoa. Now I am so close to my target weight, I've become impatient and I'm not eating many starches but the occasional carrot. I probably average 40g/day and I try not to go below my BMR in calories (which still leaves me with a deficit of 4/500 cals/day).