If you are using wallets on PC and you are also receiving emails and browsing the Internet on such pc make sure you watch your step very well, there is a malware out there that can swap the address you want to send coins to with a scammers address, I was so lucky to noticed this and I have the habit of cramming the last three alphabets of the receivers address after clicking on copy. May we not work for scammers to enjoy our hard work in the end.
Things are back to normal after I formatted my PC