Yes I did, it still gives me random addresses that are not linked with my main wallet, I invite you to try yourself.
I just made a test wallet with 3 BTC address and it still provides me +1k even more...
How is that possible?
I don't know what the problem is, that webpage worked for me when I tested it with a multibit HD seed.
What do you mean by "it still provides me +1k even more"?