Definitely all these things would have to be mentioned in the Rules section before the rule description can be called "clear and unambiguous".
As to the issue of combining the articles, it would be important to keep in mind that what the editors here prefer in general overrules what the authors prefer. So that when there is a discrepancy there, your only chance of getting anything published is to convince the editor that its original preference would have some very serious disadvantage. So that at least one of the editors involved in judging submissions will change its mind. The remark that you prefer it otherwise is unlikely to do that.
Definitely all these things would have to be mentioned in the Rules section before the rule description can be called "clear and unambiguous".
As to the issue of combining the articles, it would be important to keep in mind that what the editors here prefer in general overrules what the authors prefer. So that when there is a discrepancy there, your only chance of getting anything published is to convince the editor that its original preference would have some very serious disadvantage. So that at least one of the editors involved in judging submissions will change its mind. The remark that you prefer it otherwise is unlikely to do that.