It is really interesting that transactions f5b06763dc780608dd63b44ed4b6a20097ed66b45c59177710cd692230fcbecb and 3befa4d5c84ce1518327911d436b8852996da47f091d4c725a2ebca4fef98f52 both had outputs of 0.35298503 BTC. This suggests that two seperate wallets share the same private key. That is practically impossible unless a hacker got into your computer or you were using advanced key management features improperly.
Care to elaborate on the bolded section?
Also the OP is using Electrum. I'm not sure electrum offers advanced key management features. Which feature are you referring to?
Just trying to learn here.
Thanks for your input.
I doubt a hacker would only steal from one address. They would have cleaned out the wallet using keyloggers. Electrum has the ability to import and export private keys as well as sync to other wallets.
DON'T USE THEM unless you are an expert. I lost dozens of BTC that way before I learned the dangers.