Capacity of the Small Bomb Container "SBC"

[JDCAVE]

I would like to confirm the capacity of the Small Bomb Container, SBC. The ORB for dad's a/c KB.762 for February 20/21, 1945 to Dortmund indicates 1500, 4lb incendiaries. Dad's log book records 1X4,000 and 11 SBC's. The two pieces of information would indicate ~136 4lb incendiaries per container. However the caption for this photograph for a similar bomb load (12 SBC's) indicates 236 4lb incendiaries.
https://commons.wikimedia.org/wiki/F...M_CH_18371.jpg
The information from the ORB would suggest a 10,000 bomb load and the second load would suggest 15,300 lbs, which seems incorrect to me.

Thoughts?

Jim