Stop Losses with Offsets

[bates32]

Hi. Today I attempted a new horse racing strategy. It was to back horses in-running, my back bets having both an offset and a stop loss.

Example: Back @ 1.7 with an offset @ 1.4 and a stop loss @ 2.3.

However during my day's trading there were 3 occasions where both my stop loss and my offset were matched. As you can imagine, that left me with a big losing position on a horse I fancied!

The help guide to Gruss claims that once a stop loss or an offset has been matched, the other will be automatically cancelled. Can you shed some light on why this happened? Whether I may be doing something wrong?

The markets, especially at end the end of a race are always volatile and weak, could it be the software is too slow to react in such conditions?

Thanks.