Thanks teddy! 

Bitcoin newbie here. Providing some feedback plus I have a question.

Just writing to say I  used bitmixer.io for the first time today. All 3 of my transactions went through, although the last one gave me a bit of a heart attack as it took 9 hours to clear. However, the problem was on my sending end, not at bitmixer's end. (Apparently I didn't set fees high enough and for some reason the transfer was more bytes than normal so low priority I guess.) Once the transaction to bitmixer is confirmed, bitmixer sends BTC back within minutes. If you send more than you said you would, you get the full amount, less fees of course.

I saved the letters of guarantee each time after reading through this thread, checked the addresses and verified all the signatures. All good.

Please could someone explain to me how increasing the number of forwarding addresses works? If I add two addresses does that mean that the transaction is split into two and sent to both of my addresses simultaneously or what?

many thanks