I still had these duplicates on a regular basis but not much time to further diagnose ... Now I restarted Z12 using a fresh 1.60.1 installation - and again duplicates after just a few days:

Trade ID Lots Entry Time Entry Price Stop Trail Target Risk Profit Pips
[AUD/USD:NET:L8864] 8078864 31 07-28 08:19 0.7968 0.7969 0.5578 - - - - - - - - -6334$ -0$ -0.1p
[EUR/USD:NET:L0742] 8090742 18 07-28 16:19 1.1747 1.1857 0.8223 - - - - - - - - -5402$ 166$ 108.1p
[NAS100:NET:L1665] 8131665 7 08-01 08:19 5914 5912 4140 - - - - - - - - -10508$ -19$ -31.9p
[NAS100:NET:L6937] 8136937 3 08-01 12:19 5900 5912 4130 - - - - - - - - -4499$ 27$ 107.6p
[GBP/USD:HP:S7153] 8157153 8 08-02 01:46 5943 5911 1.8481 - - - - - - - - +40243204$ -189$ -278.9p
[NAS100:NET:L7153] 8157153 7 08-02 04:19 5943 5912 4160 - - - - - - - - -10562$ -189$ -319.1p

[USD/CAD:HU:S0357] 8170357 19 08-02 15:26 1.2545 1.2562 1.7563 - - - - - - - - -6427$ -23$ -18.0p
[AUD/USD:NET:L1156] 8171156 32 08-02 16:19 0.7979 0.7968 0.5585 - - - - - - - - -6459$ -31$ -11.4p
[USD/CAD:NET:S1157] 8171157 31 08-02 16:19 1.2550 1.2562 1.7570 - - - - - - - - -10458$ -28$ -13.6p
{AUD/USD:CT:l9802} 69802 31 07-28 08:19 0.7968 0.7969 0.7706 0.8230 - - - - -697$ 2$ 0.6p
{EUR/USD:CY:l0004} 70004 18 07-28 16:19 1.1747 1.1857 1.1828 1.1886 - - - - +122$ 166$ 108.3p
{USD/CAD:CY:s0105} 70105 19 07-31 00:19 1.2481 1.2562 1.3003 1.1959 - - - - -681$ -109$ -83.9p
{GBP/USD:BB:s0606} 70606 36 07-31 20:19 1.3194 1.3226 1.3366 1.3022 - - - - -528$ -102$ -33.6p
{NAS100:VO:l0908} 70908 7 08-01 08:19 5914 5912 5828 6000 - - - - -516$ -20$ -33.2p
{NAS100:HU:l1009} 71009 3 08-01 12:19 5900 5912 5609 6191 - - - - -741$ 27$ 106.8p
{NAS100:VO:l1410} 71410 7 08-02 04:19 5943 5912 5856 6029 - - - - -516$ -189$ -320.0p
{GBP/USD:HP:l1611} 71611 28 08-02 12:19 1.3231 1.3226 1.2936 1.3526 - - - - -702$ -15$ -6.4p
{USD/CAD:HP:s1712} 71712 31 08-02 16:19 1.2550 1.2562 1.2881 1.2219 - - - - -695$ -31$ -14.8p
{AUD/USD:HP:l1713} 71713 32 08-02 16:19 0.7979 0.7969 0.7720 0.8238 - - - - -703$ -32$ -12.0p

In MT4, 8157153 is the NAS100 trade (0.07 long) while GBP/USD is 8155548 (0.08 short).

To summarize:
o MT4 statement
- GBP/USD 8155548 is only visible as an open trade, 0.08 short.
- NAS100 8157153 is only visible as an open trade, 0.07 long
o Zorro\Log\trades.csv
- HP,Short,GBP/USD,8157153,19,2017-08-02 01:46,2017-08-02 12:19,5942.60,5933.40,-38.31,0.00,Reverse
o Zorro\Log\Z12real.log
[...]
[Wed 17-08-02 00:19] 11598 +360 +378 //// 1.1801/1.18141.1800/1.1810
[...]
{GBP/USD:HP:l9701} Stop 27@1.32010: +277$ at 01:46:41
Entr 1.3080 Exit 1.3201 Spr 0.0001 Slp -0.20$ Rol 0.54$ Com 1.62$
Enter 27S GBP/USD Stop 0.4548 at 01:46:41.
[GBP/USD:HP:S5548] Short 27@1.32010 Pool trade at 01:46:41
Stop: 1.8481 Trail: 0.0000 TakeProfit: 0.0000
[...]
[Wed 17-08-02 04:19] 11686 +360 +465 //// 1.1810/1.18291.1794/1.1823
Enter 1L NAS100 Stop 86.2268 Trail 86.2268 at 04:19:01
{NAS100:VO:l1410} Long 7@5942.60 Risk 522$ ts at 04:19:01
Stop: 5856.3730 Trail: 6028.8271 TakeProfit: 0.0000
Enter 7L NAS100 Stop 0.4531 at 04:19:01.
[NAS100:NET:L7153] Long 7@5942.60 Pool trade at 04:19:01
Stop: 4159.8203 Trail: 0.0000 TakeProfit: 0.0000
[...]
[Wed 17-08-02 12:19] 11485 +360 +265 ////\ 1.1834/1.18681.1819/1.1829
[...]
[GBP/USD:HP:S7153] Cover % 19@1.32309: -38.31 at 12:19:01
Entr 5942.6001 Exit 5933.3999 Spr 0.0001 Slp 0.32$ Rol 0.00$ Com 0.48$

But I guess you need to see all the phantom trades, too?
I can provide Zorro's logs and an MT4 Detailed Statement for diagnosis, if needed... where to send it to?
I will even leave both trades open for now as I'd like this to be fixed as soon as possible.

Thanks.