Jurgen is right, at least you are learning your lesson in paper money, I had that happen to me in real money.
Thanks for the response, on using UI we din't see 10-15 ticks increments, but with API we observed it more, as our test cases with API were more extensive.
We will try and use STP LMT as you suggested and find out a way to flatten orders when needed using Price/Time conditions.
