Usage Charge Issue

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Hi all! 
I have troubles with usage charges. My app works by next flow - app generates popups with discount, and when discounts usage will be more than 10, app creates usage charge every month (every 30 days).

So app created usage charge :

Снимок экрана от 2020-05-14 16-56-49.png


On this image you can see that billing date is 2020-05-12 , so i was waiting for this date) Then on this date i saw that charge was not billed , though on shopify app logs i see nextСнимок экрана от 2020-05-14 17-01-41.png

Then i created request to get all usage charges for this store and saw next

Снимок экрана от 2020-05-14 17-02-56.png

I have a question : how usage charge can be updated (as you can see id and  created date the same)? 

So , please help me, maybe i do something wrong, maybe wrong billing flow i use.