So this is their latest replys.
"Many other coins have similar addresses formats such as VET and ETH, and it is almost impossible to prevent this kind of mistake apart from being attentive to the address and double-check where are you sending your funds to. The coins that have different formats will not let you mix the addresses and you will see the error when sending.
They can't be this dumb, so they must know they're making up BS. Dogecoin addresses are not "similar" to Bitcoin addresses, there's a huge difference. It's not possible to send Bitcoin to a Dogecoin address, so of course that didn't happen.
I'd like to see the Atomic wallet people explain how they created the Bitcoin address.
being attentive to the address and double-check where are you sending your funds to
What's the use of double checking the address, if the wallet internally decides to send it to another address than what you entered?
The coins that have different formats will not let you mix the addresses
So they're back to claiming Dogecoin and Bitcoin have the same address format.