Bark can dry out very fast, you may have to do some deeper soakings to keep this moist.
I like bark with sphag, if you coupled these 2 medias together you would be able to reduce some of the watering times.
I use to pot up many of my orchids tightly - I no longer do that - too much watering for me. So I use more sphag, peatmoss or over pot up a size.
Theres' many ways to grow you just have to find out what works best for you.
If this was mine I would not divide this up yet. I like to wait til I see 8 to 10 bulbs.
Sup to you
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