ID error

It's been about 2weeks since I send my first five postcards on postcrossing. And last night I realized I made a mistake when I wrote my ID on them which I already had send.
I also got a messege from postcrossing,it said "Forgotten or incorrect Postcard ID!"
I misunderstood as I should write same ID whenever I write a card. But actually I have to write defferent ID for each postcard.
I copyed everycards I send last time, so I found out easily what number I wrote on each cards exactly.
I've send them a message and wrote correct number. I hope they'll register my right ID.

I ashamed my misunderstanding.

I wrote 8 cards last night.
Here are some of those.