Confused my old wallet has activity?

Hey Guys,

I have an old wallet address that was discontinued from Newton after a system upgrade, They made everyone change their ethereum address to a new address and they were discontinuing your old address.

I looked up my old address and there was .4 Eth traded from that account 35 days ago??
https://etherscan.io/address/0xef0b10ab73d92bfb44258bf09cd6da38e3f777cb

I haven't had access to this account through Newton exchange since December 2021.

How is this possible? the re-use of an old address?