Today I had a stop order in for some SPY puts around noon. Market went my way so I decided to sell, went to the order type tab, left clicked it, noticed it only gave stop or market order, so I canceled it then made a new sell order. 3 hours later a box suddenly pops up telling me I can't sell naked puts. I am confused and X it out. About 5 minutes later I realize it was the stop order triggering. I have had multiple instances where I went to create and order and when changing the default order size to the size I want, it changes back to the default size as soon as I click to change the limit price. As expected, IB was a bit uncooperative. I assume this is my fault since I have only been trading with real money for about a year but maybe I can find some false sense of comfort if this has happened to someone else.