The way i have set up my “system” (for lack of a better word) is this
So what you see here is this, i pin my pin in my main account in board A and in board A i have pins from the same niche these are all my own pins from my website, right.
Now i have in tier 1 also a board A and that board is filled with pins in the same nice, i pin with keywords and the url of Board A out of the main account now i get the url of board A from T1 and open up the accounts in tier 2 and do everything all over again.
The reason why is that if you take your pin down the tier your pin will get more credits,as i have understand it the more distance between you and your pin the better it is, and the more credits means better rankings in the search (where the real traffic is) now i would love to create up to 10 tiers but it is such a painstaking and time consuming job to set up in Massplanner.
Anyhow that is the reason (so i have been told) that the changes after every repin it has tracking reasons and no doubt do they wanna make our lives harder 