Ideas to fix the Refinery building bug (Tib3)

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As the topic states I'm trying to fix that annoying bug that the A.I. sometimes start building 20-30 refineries all in one place. I think that stopping the AI from building refineries for harvesters then selling them, presumably they do this to prevent resource extraction from cutting into weapon production time, will stop this error. I tried just removing the free harvester with the refinery but the A.I. apparently lacks the 'I' aspect of its name. So I need to change the A.S. (artificial stupidity) to build harvesters not just refineries. The only problem is that I can't make heads nor tails of the A.I. files (they're continuously referencing different sub directories of different A.I. behaviours for different occasions (whatever those occasions may be)).