Unusual ceramic pads wear

[M-A8]

Hi all
I've just picked new front pads up for ceramic brakes and would like to know if I've...:
- Done the right thing
or
- Spent £350 just for extra 1.5mm of pads compound??

See the pictures to understand the question I'm trying to answer.

Set 1
This are the pads from normally wearing ceramics, but driver's disc has chipped badly on the inside.
My explanation to the state of pads is that damage to pads was caused by the debris from the chipped disc.

Set 2
This is the set from a very good set of ceramics, but with slightly weird wear on discs, a bit of rusty look on the outside and inside of the contact area, and middle looking slightly more worn but nothing dramatic.
No damage to the disc, but same weird wear on the pads.

Set 3
Brand new pads

All pads are genuine Audi part.


Is this is how pads for ceramics wear off and small missing chunks on every pad is a normal thing?

Are both sets faulty????

When you look at the brand new set, they already have small chunks missing - not as large tho.

So is this how ceramic pads wear off and missing chunks of pad compound is a normal thing on them??

Or is this a result of ceramic brakes not being ''used properly''. if such a thing even exists??? Something along the line of pushing to hard before pads and discs are warmed up??

I understand these are all weird questions, but my knowledge about ceramic brakes is very limited and I've got a feeling that this purchase of brand new pads was completely unnecessary especially after comparing them with 2nd set of pads (middle set from the first picture).

Last picture is the pad which was on the inside of driver's disc (chipped disc).

Thank you all and have a great weekend