synchronization correction

[kramnollem]

I am a little confused.  I set up with 4 contracts s&p500 with a stop loss at 100 and a take profit at 50.  I hit the buy or sell and see everything has been placed correctly.  When the tp is placed, instead of $100 (4 contracts at $12.50 a tick and I set 2 ticks) it shows a $50 profit.  Moments late a get a correction synchronization message and it takes $49.20 from me.  This didn't occur when I was paper trading.  What is this?