In the latest versions of 16 and 17 the raw content rules check stops after matching the first rule if the rule is not set to ‘match multiple’ and has the same rule type argument (e.g. contains or wildcard) as subsequent rules. When I say “first rule” I’m referring to the order in the spamConfig file, so that is essentially the rule that was modified longest ago as rules are moved below related rules when modified. It appears that the ‘match multiple’ code is running against the rules rather than running against each individual rule.

If customers do not have ‘match multiple’ enabled then a fix for this could have unexpected matches and a very different Spam score.