Dan, you can keep feeding them rots for months. They never seem to overeat and die on rots nor will they starve if they had rots and no BBS. I think you are OK just starting one batch of BBS a day. I did mine in the evenings. I think maybe you just overfed. Put smaller amounts in at a time. You can always add more. I had three bottles percolating at a time. One new bottle, second bottle 24 hours older and the third a day older but was mostly havested the day before and would be fed to the reef if the babies didn't need them.
My Chromis' even like rots. I don't think clowns ever get too old for them. Hard for me to remember but, I think at that age, I fed 60% rots, 20% BBS and 10% Golden Pearls. I have a bottle of SF Bay brand BBS in my frig if you want. Aquatic Gallery had some new food that they are using instead of Golden Pearls. I don't know if they were selling it or if it was just for their own larvae. Tom there is an experienced clown raiser.
Are straining your rots before adding them? Their water is pretty dirty.
Better luck with the next batch.