Strange colour blocks

[lentulax]

In the ladders I find solid red and orange backgrounds occurring in the Price Column. I have the Bet Display set to In Price Column , so normally matched bets are displayed by the amount of the matched bet appearing against a pink or pale blue background in the square which displayed the price at which the bet was matched . I find that the red blocks do in fact contain the amount of my matched bet on that race , but they actually appear three blocks above the one containing the price at which the bet was matched ; meanwhile , in the block showing the price at which the bet was matched the price appears on a white background , instead of the usual grey. I've not been able to replicate the orange which I noticed earlier. These are permanent (i.e. not flashing) colours . I've just started using the software , so I've gone through the help files , but can't find any explanation ( in fact , I can't find any mention of orange at all!) . It doesn't appear to affect the essential functionality , but I'd be glad if anyone could tell me what's going on.

Mike