sound like you have a single form view on top for person (which is correct) but also a single form view on the bottom. If so, change subform view to datasheet. The result should be that person details on top as before with a list of achievements in the bottom. Move main form record to next person and datasheet details should change. You might want to hide navigation controls from subform.
If I have that all wrong then more details are needed as I had to guess what is where or the design characteristics.
The more we hear silence, the more we begin to think about our value in this universe.
Paraphrase of Professor Brian Cox.