in fact it has not doubled nothing, has just added the one won in the previous month to the warehouse stocks, even bronze and timber

Demone, let me explain this situation in details.

When you raid a City, you receive some resources. You receive the exact amount on raided resources at once and the same amount of resources are added to the Battle Pass Multiplier. It means that the stolen resources from the raid were doubled. As soon as the Battle Pass season ends, you receive those doubled resources. 

I hope it helps. 

Hello nancy, if I understood correctly in the warehouses at the end of the war pass the resources that I saw in the bonuses were added before the war pass ended, These resources had already been doubled. I got it right?

Hello nancy, if I understood correctly in the warehouses at the end of the war pass the resources that I saw in the bonuses were added before the war pass ended, These resources had already been doubled. I got it right?