I sent my earned incents to my waves wallet a month ago. I browsed with four different accounts, one after another, and then sent all to one waves address. But I received only one transaction (from address 3PEgFrVJw8oaPHmas4pYTG6mWZiESSkfJXC). Three other transactions did not came.
I did not think that I did something wrong if I browsed with different accs, if this is the case. At least there were just four. Is it the reason to take away my incents?

Well, it is against the terms and conditions, but I'm not sure what the reason is - have you contacted support?