Here we go!

first and foremost, STOP ALL NUTRIENT FEEDING! your plants or "sprouts" are much too immature to start feeding any kind of nutrients. In fact, I could be wrong but doesn't miracle grow soil contain small amounts of miracle grow in it already? I am not a soil grower currently although I have done one soil grow in the past, but my experience and memory seems to recall that anything from the miracle grow brand is not properly suited to grow marijuana.

Next, your humidity is a problem. I don't mean to get you alarmed but 22% is too low. I wouldn't have said anything if it were in the 40%-50% range even though it is a bit low, it is still tolerable. Right now all through veg your plants need relatively high humidity in the 65%+ range preferabally in the 70% margin. Easy remedies are to purchase a humidifier or add a large bowl full of water to the grow room.

It sounds like you had some outdoor issues that you dealt with and that is good. You brought them inside, put them under proper lighting and things should be good now. Once you did this your plants should have started to take off but they didn't and as a result are way too small for their age (17 days?). You need to flush your plants with pure distilled water very mildly. DO NOT OVERWATER. You need to get the plant fertilizers out of there and let them do their thing naturally.

If their growth continues to be stunted then it is likely you have some nutrient lockout and the roots are unable to penetrate further into the soil. Anyways, these are simple mistakes there is still plenty of time to make things right. You don't want to start nutrient feeding until about a 3 to 4 weeks into veg or based on their size.

Good luck, don't worry they will pull out!