OKCoin order handling...

I have a question about okcoin and their order system.

I had created a long position at 216.53. Order filled. Then i created a trigger order close long 216.28 trigger price and 215 order price. After that a close long limit order at 217.25.

Both orders existed so i was sure they are valid and that, if one order fills, the other gets invalid because there arent enough contracts for it to be filled otherwise. Since they both were close longs.

It ended the way that the price fell hard and i made a market sell (didnt know it was a trap). The trigger order did not trigger, even though it was live and now it was got cancelled with "ordered failed" and im not sure what happened with the limit order. It shows cancelled.

So what happened? Why do the two orders exist together but only one of them gets eventually filled? I mean that isnt margin trading where you could end up buying shorts when both orders fill. So it would be normal that more than one order for the same contracts can exist. They would simply be cancelled if impossible to fill. And since they both stayed live i had to assume that they both are valid. But for some reason only the limit order was active and the trigger order did no trigger at all.

What went wrong? The support claims my error was to create the limit order. But both orders stayed there at the same time. So i had no reason to believe they arent active.

I think thats confusing and prone to errors and complaints. I only wanted to secure my position without having to watch it all the time. The way it looks now it seems i cant do this at okcoin.