It´s no problem between Z12 and Z2, this 2 systems have similar strategies and normaly trade in same direction.
Only trading Z12 alone generated following trades today morning:
action size basic price time fees$
SLD 8K EUR EUR.USD 1.21181 USD 09:47:22 4.03
BOT 3K EUR EUR.USD 1.21177 USD 09:47:21 4.03
BOT 13K EUR EUR.USD 1.21179 USD 09:47:21 4.03
BOT 3K EUR EUR.USD 1.21173 USD 09:47:19 4.03
SLD 15K USD USD.CAD 1.25290 CAD 05:20:21 4.03
SLD 3K USD USD.CAD 1.25291 CAD 05:20:16 4.03
SLD 27K USD USD.CAD 1.25291 CAD 05:20:16 4.03
SLD 4K USD USD.CAD 1.25291 CAD 05:20:15 4.03
BOT 10K GBP GBP.USD 1.35368 USD JAN 11 21:20:39 4.06
BOT 2K GBP GBP.USD 1.35368 USD JAN 11 21:20:38 4.06
SLD 2K GBP GBP.USD 1.35362 USD JAN 11 21:20:37 4.06
BOT 11K GBP GBP.USD 1.35368 USD JAN 11 21:20:30 4.06
BOT 12K GBP GBP.USD 1.35367 USD JAN 11 21:20:29 4.06
BOT 1K GBP GBP.USD 1.35368 USD JAN 11 21:20:21 4.06

It is visible that the algo open and close same position in some seconds and so only generate fees. The decision of position size seems to change in very short time, so the algo open one position after another. But it should open only one big position.
In my opinion the high IB margin leads not to problems. Capital in Zorro adjusted to IB cash works proper since some month. It caused no margin calls and should have no influence to algo performance (at least it should not be a reason for losses).