You're supposed to chill the bulbs first for 4-6 weeks before planting in warm climates so that may be why not all of them are sprouting. They are also coming up very early although that won't matter much in LA.

Here are the bulb planting instructions for CA I was given when I first starting planting bulbs.

http://cemadera.ucdavis.edu/newsletterfiles/Master_Gardeners_Articles4135.PDF

By the way, I usually buy most of my tulip bulbs from the home center or Costco in CA and they never tell people that they should refrigerate before planting.

I guess they just don't know or don't care?

Scheepers will even hold on to your order in cold storage and ship late if you ask them but prics are a little high for throwaway tulips.

I have never seen a tulip bulb once it was planted. Is yours planted in soil or some kind of see through planting mix? If the brown tunic is removed at planting it won't make any difference. Without chilling your tulips will probably not get very tall and may not bloom at all. Al