Why bio info automatically appearing in partners bio

Question

and if I delete from partner it is deleted from individual intended

Answer 1

This glitch drove me crazy too, til I worked it out.

When I made a change to a Biographical tab, then clicked their partner, the details were on partner's Bio tab instead.

Then I realised it only happens when I forget to Save or click OK.

Once I remembered to click OK, it stopped doing it.