You are equating pound and POUNDAL ['pound mass']. They are two
different things.

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Sears and Zemansky, 1956, Table 5-1, page 77

Systems of units Force Mass Acceleration
Engineering pound Slug ft/sec^2
mks newton kilogram m/sec^2
cgs dyne gram cm/sec^2
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"One standard pound, by definition, is a body of mass 0.4535924277 kg."

"Since the weight of a body is a force, it must be expressed in units of
force. Thus in the engineering system weight is expressed in POUNDS; in
the mks system, in Newtons; and in the cgs system, in dynes."

Unless you disagree with Newton's Second Law, F=ma, Force [pounds] and
mass [slugs] are related by acceleration [of gravity, for example].

So, my weight [240 pounds] = my mass [7.45 slugs]*[gravity of 32.2
ft/sec^2].
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If you want to argue, go ahead. I cited a source as you asked. Now you
choose to disagree with that source.

My final comment: Does a newton[force] = a kilogram[mass]??
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Conclusion:

Force = pounds, or newtons, or dynes.
Mass = Slug, or kilogram, or gram
Acceleration = ft/sec^2, or m/sec^2, or cm/sec^2
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Don't be so everbearing! It does not become you or enhance you statements.