Jubilee Line - Experimental floor markings?

During the course of the week some nice floor markings have started to appear on the platforms along the Jubilee line (on the London Underground), the only problem being, they seem to be different not only at each platform, but in some cases, at each door...some much more confusing than others...as of yesterday people still seem to be completely ignoring them when the platforms are busy (making life very difficult for the poor souls trying to get off the trains)...so I'm guessing hoping we are all being watched on CCTV to see which design has the greatest effect on crowd behaviour, rather than it just being sloppily implemented... ;)