You're right I could sum them, those are all expired orders actually, I forgot about the margin called orders. I was under the impression the 10% above price was a bug, isn't it? Expired orders should be at the feed price though right?
The bug was that expired cover orders had a limit price at 10% above the price feed when it was supposed to be at the price feed. However, margin call cover orders should have a price limit 10% above the price feed.
Thanks for the clarifications, I've worked some more on the wallet this morning and I believe I have it right this time. One thing that I'm unsure about is, what happens to a margin called order that expires before getting filled? Does it stay at +10% price, or does it revert to the feed price? I suppose it's the former, but unfortunately there's no way for me to distinguish between a call that had previously been margin called but is now expired..
Here's a screenie from bitBTC which currently has expired and forced margin calls at the top of the books:
FYI atm bitUSD as of right now still has an invisible buy order of 1275.55 bitUSD at 243.4266 BTS/bitUSD, and the expired orders make up a whopping 186944 bitUSD at 221.29 BTS/bitUSD. At least this makes the whole trading action make a lot more sense, what was missing from my understanding was the forced margin calls at +10% which were invisible in the client.