The Disperse Siblings feature is designed to maximize:

1) The gap between the due dates of the siblings.

2) The gap between the latest review date of the siblings and the current due dates of the siblings.

The function also ensures that the due dates of all the siblings stay within their respective fuzz ranges, preventing any card from diverging too much from its optimal interval. This is crucial for maintaining the balance between sibling dispersion and retention.

Occasionally, the function can bring the due dates of siblings closer together rather than dispersing them. This occurs in an attempt to increase the gap from the latest review date. This creates two problems:

1) It confuses the users since they expect that siblings will only become spaced further away from each other once this feature is enabled.
2) It defeats the point of this feature, which is to amplify the spacing effect for all siblings.

The issue of siblings being brought closer could theoretically be solved by allowing dispersion beyond their fuzz ranges. However, this approach introduces several potential problems:

1) It's unclear how much beyond the fuzz range would be acceptable. Even if an arbitrary amount is chosen, the same issue of siblings being brought closer together could still arise.

2) Moving cards significantly beyond their fuzz range could negatively affect retention.

3) If one sibling is being reviewed frequently at short intervals, allowing unlimited dispersion could result in other siblings being delayed multiple times. This could significantly affect retention and may even cause them to be never shown to the user.

Do you think that Disperse Siblings should be changed?