Based on your other question I think you're expecting that any instance of a satchel if repeatedly collected will give you each subsequent journal from that series, however this is not the case. By design each satchel and journal is numbered and if you already have the journal you will simply get gold instead.
As mentioned in my answer to your other question, the locations of many of the Journals and Satchels is random, and only a random selection of each will spawn in a particular game world. You will not find all of them in one playthrough. Each of the spawns is unique, so picking up the same one twice is a possibility and the second time you pick it up you will get gold - this is normal.
The intention is that you will find the ones that you need at a later date on subsequent playthroughs.