In my opinion it is an obvious mistake on every Socionics website I know that they do not distinguish between "Supervision j>p" and "Supervision p>j" respectively "Benefit j>p" and "Benefit p>j".
I know a lot of beneficiaries (IEE) and supervisees (SLI) and normally get along with them very well. With benefactors (IEI) and supervisors (SLE) it is much more complicated.
I assume that j>p - relations are generally much better than p>j - relations. The reason might be that Alpha and Delta members get better along with each other than Alpha and Beta members.
The question is: why does no Socionics website distinguish between j>p and p>j???