WHY PAST PERFECT

hello teachers

Kult Country front man Yousif Al-Karaghouli is someone who makes things happen. Within a week of arriving back to Manchester from a spell in France he’d become part of burgeoning cult label Sways Records, within two he’d formed Kult Country

first he went back from France, then in one week he became and in two weeks he formed .There is no use of past perfect.
or does it mean
first he went back to France ,then in less than one week he had already succeed in becoming .....and in less than two weeks in forming.....to stress that he managed to do that (become and form) in a so few days.

Let me know if I am right ?if not let me explain why past perfect is used and what does that mean?

Thank to help