Publisher has changed many terms in section/subsection titles to acronyms
You should not assume that all changes introduced by the typesetters are the result of enforcing some house style. You should also not assume that these people are particularly competent. If they modify your text in some nonsensical way, you have two choices:
Page 7, line 15: Replace "Estimating the CPTs of a BN" by "Estimating the Conditional Probability Tables of a Bayesian Network".
Page 7, line 15: Please replace "Estimating the CPTs of a BN" by "Estimating the Conditional Probability Tables of a Bayesian Network".
Personally, I'd choose the first variant. This is not a request, this is an order. If they don't comply, escalate to their supervisor.