I get the same result even without the only rank I see in your example. Am I missing something?
13!:0]1
demofn3=:3 :0
X=. i. 10
Y=. demofn2 X
)
13!:3'demofn2 1'
demofn3''
|stop: demofn2
| b=.2*a
|demofn2[1]
13!:19''
|stop: demofn3
| Y=.demofn2 X
|demofn3[1]
--
(B=)
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