Only one part being developed

When i recieve my design report only one part has been developed ? is this a bug or something i am missing as i have equal drivers on all parts of the car

Paul, I have just had a quick look at your account. The date next to the parts in the design section, tells you when you will get an update for that part. So for example, tomorrow you will get upgrades for rear wing, suspension & underbody.

I hope that answers your question. Please let me know if it does not

So only next years parts will only be developed when they are ready so tomorrow i will have upgrades to rear wing suspension and underbody for next years car ? but not the others, also how do i activate auto kers

every upgrades you received is applied to both season. the upgrade percentage you receive is depends on your current design emphasis.
kers is automatically active.