Cynd
I hope you see this before you apply tomorrow. You may want to consider your mix as the SEAL phase of the Moisturize, Condition, Seal (MCS) process.
So you have moisturized and sealed. You seem to be missing the CONDITION segment. Oil is a sealant - so if your hair is dry underneath the oil will seal in that dryness. Add the drying affect of sulfur and you have a perfect environment for hair breakage.
With the light bulb coming on recently that I have been combing out all of my growth because of my hair not being moisturized and conditioned - I am a MCS predator on my hair. I always have a mix of water and conditioner in a squirt bottle prepared for use at all times. (I have one at my office also along with an oil mix in an old water bottle
) My last two take downs have had very little hair comb out and my DGD's hair had even less. (she's 4 and I make her MCS and baggy every night too and trust me it has paid off big time.)
Scarves give me a headaches too so I use the satin bonnets over the plastic caps. I have gotten to the point I can't go to sleep without my bonnet on. If you are using a scarf try switching to a bonnet $2.99 or less @ Walmarts and they seem to stay on.
You mentioned adding more JBCO - that oil and castor oil in general is very very heavy. And if your hair is low density it may be "weight" to your hair. If you are going to increase oil content in your mix - consider adding some coconut oil which has moisturizing and conditioning properties.
PLEASE consider adding the condition phase (I am trying to use up as many as my hair products as possible so I even use regular conditioner with my water).
I am using ayurvedic oils (bhringraj, brahmi, amla) in my mix, which are supposedly good for hair breakage, growth and strength.
Sorry for writing a book - but I know you and I are on a mission. And I want it to be MISSION: POSSIBLE.