Support Board

I got 2 targets in place, one at 113.61 and the other one at 113.65, with the entry at 113.23.
Last night both targets was reached without any problem but, this morning, when I opened up my platform I saw that I was still into the position with the main order, which was at 113.23.

So, what I did was "flatten" the position through the trade window menu when I suddenly noticed that an order has been placed on my account (because on my Lmax account I was Flat), so I was Flat on Sierra and short on Lmax.
So, view that this awkward situation, I close the trade through my Lmax portal and suddenly an order appeared on Sierra (so at this time I was flat on Lmax and Long on sierra).
Then I tried to flatten again on Sierra and I found my self short for the second time on Lmax (and Flat on Sierra).
I closed the short position through Lmax and again long on Sierra.

So what I did was refresh trade data from service and the "supposed" order on Sierra disappeared.

So guys, what the hell is happened? Luckily I had my Lmax portal opened and then this kind of "joke" costs me just a couple of pound plus commission.
But what if I did not have the account opened and I trusted just Sierra???

In my trading activity log, under trades section, if I set the range date just for today, the 7th of July, I can see one trade on USD/JPY (short) with Avg entry at 113.681 at 2:46:52 GMT with an entry quantity of 213 and an Avg exit price at 113.698 with an exit quantity of 142 and P/L of -24.72GBP without exit date time.