Hi guys, got a question.  My algo only places orders at 15:00:00 on certain days.  I have 2x leverage set.  Whenever my leverage is above 1.0, I'm noticing random margin calls for orders placed at midnight that I didn't request.  Has anyone had this problem before?  Is this a bug?

Thanks!

2015-09-12 00:00:00 TVIX $13.24674USD Market -1,926 Short Filled Margin Call
2015-09-10 15:00:00 TVIX $14.68467USD Market 10,241 Long Filled
2015-09-08 15:00:00 TVIX $16.96302USD Market -8,029 Short Filled
2015-09-08 00:00:00 TVIX $USD Market On Open -8,029 Short Canceled
2015-09-03 15:00:00 TVIX $15.08507USD Market 8,029 Long Filled
2015-09-01 15:00:00 TVIX $14.76522USD Market -6,951 Short Filled
2015-08-27 15:00:00 TVIX $11.95194USD Market 6,951 Long Filled
2015-08-19 15:00:00 XIV $47.83212USD Market -1,761 Short Filled
2015-08-18 15:00:00 XIV $48.49845USD Market 1,761 Long Filled
2015-08-17 15:00:00 XIV $47.79216USD Market -1,760 Short Filled
2015-07-29 15:00:00 XIV $46.99695USD Market 1,760 Long Filled
2015-07-28 15:00:00 XIV $43.70625USD Market -1,898 Short Filled
2015-07-14 15:00:00 XIV $43.81377USD Market 1,898 Long Filled
2015-06-30 15:00:00 XIV $40.42953USD Market -1,606 Short Filled
2015-06-30 00:00:00 XIV $40.42953USD Market -936 Short Filled Margin Call
2015-06-23 15:00:00 XIV $48.50846USD Market 2,542 Long Filled
2015-06-22 15:00:00 XIV $46.48347USD Market -2,683 Short Filled
2015-06-19 15:00:00 XIV $47.01697USD Market 2,683 Long Filled
2015-06-16 15:00:00 XIV $44.67528USD Market -2,306 Short Filled
2015-03-20 15:00:00 XIV $34.12409USD Market 2,306 Long Filled
2015-03-19 15:00:00 XIV $34.08588USD Market -2,209 Short Filled
2015-02-25 15:00:00 XIV $32.45242USD Market 2,209 Long Filled
2015-02-19 15:00:00 XIV $29.52045USD Market -2,395 Short Filled
2015-02-13 15:00:00 XIV $29.06904USD Market 2,395 Long Filled
2014-12-11 15:00:00 XIV $33.99597USD Market -1,838 Short Filled
2014-12-11 00:00:00 XIV $33.99597USD Market -466 Short Filled Margin Call