I transferred my bitcoins from a website to my wallet. I put only one receiving wallet. I have both of the wallet addresses but do not know how to access the one that took a chunk of my transfer. How do I access it or is it gone? Why would it have been done like that?
Are you sure that the other address that received bitcoin wasn't simply the change from the first transaction and not actually your bitcoins? Depending on the website you received funds from, they likely sent you your bitcoins and the change from the transaction went back to their own address.
I don't know too much about the bitcoin system. All I see is that the website sent the full amount. I received most of it to my correct wallet, but there is another chunk to an address I have never seen or have access to. The site is trying to research the other wallet address. Other than that I'm bewildered.
Normally, sites would send transactions with two outputs. One would be to your address and the other would either be their own address or another person's address. This is perfectly normal if you received the correct amount to your address.
If you didn't, this isn't Electrum's problem.