As far as I know the only part in the asset list that distinguishes currencies from other assets is the 'LotAmount' which is 1000 (in my case on micro accounts) with currencies. But I don't know if trade results of currencies are calculated separately?
Within the 6 trades above the results vary from -1,3 to +9,1 PIPs with 1 Lot each and the monetary result is always -600. I think e.g.

{GBPUSD_B1::l6801} Long 1@1.40057 at 20:08:34
{GBPUSD_B1::l6801} Sell 1@1.40070: -600 at 20:08:40

the calculated difference in 1 Lot is 1,400.70 - 1,400.57 = 0.13 and might be anyway around -0.50 (with commission and intermediate spread) but I cannot comprehend where the -600 come from. This way there are only a few of those trades needed to blow up my account.