It happens very often that there are consecutive "depth" messages, where one comes immediately after another and they both have the same amount/price and the opposite sign. So effectively they do nothing, except causing confusion and an unnecessary traffic.
For instance:
{"channel":"24e67e0d-1cad-4cc0-9e7a-f8523ef460fe","depth":{"currency":"USD","item":"BTC","price":"8.86852","price_int":"886852","type":2,"type_str":"bid","volume":"-0.79287883","volume_int":"-79287883"},"op":"private","origin":"broadcast","private":"depth"}
{"channel":"24e67e0d-1cad-4cc0-9e7a-f8523ef460fe","depth":{"currency":"USD","item":"BTC","price":"8.86852","price_int":"886852","type":2,"type_str":"bid","volume":"0.79287883","volume_int":"79287883"},"op":"private","origin":"broadcast","private":"depth"}
It seems like some glitch and it would be nice if could be fixed one day.
imho, all changes must be. human's or robot's..