I am having the same or similar problem which I have included in some detail here. It looks like this problem in not uncommon, yet I still have not been able to find a solution.
Yesterday, I transferred bitcoin from one wallet to my Electrum wallet, on my Android phone, with no problems. I did this due to my Mycelium wallet would not recognize the bitcoinblender.com address as being a valid address. Electrum was reccomended by darknetmarketplace.org in their bitcoin blending tutorial, which I was following as a guide to assist my first bitcoin transaction.
Later that day I attempted to transfer from my Electrum wallet on my Android device to my bitcoinblender.com wallet.
I plugged in the blender address, followed the instructions, hit send.
The coin or transaction hasn't appeared anywhere on the bitcoin blender wallet/page. When I open the details page on the Electrum app
the status shows 97 confirmations (This number has and continues to increase) I have the date and time present, the amount sent, transaction fee,
the correct blender address is displayed in outputs and a transaction ID number. There is also a bar code and a close button at the bottom of
the screen. I entered the blender address in the blockchain link supplied within the support page on bitcoinblender.com and I am unable to locate any record of my transaction. However; when I view the transaction with the view in block option on my PC it shows the bitcoin unspent with no children at the correct bitcoinblender address.
I have since downloaded Electrum to my PC using my existing seed hoping to gain more help or options. The PC version does not provide any information or options that are not present in the Android version. (Except for the view in block info mentioned above)
I fear that I just lost a fairly substantial amount of money
If you find any solutions, or have any suggestions, please contact me as soon as reasonably possible.
"Thank You"
I've never heared about this bitcoin blender you're talking about, but from what i could deduct from your story, is that there's a possibility either the blender has scammed you, or you have some kind of malware that changed the address when sending coins to the blender's wallet...
If you can post the tx id, we can look a bit further...