Of course 1099s have mistakes. Not most of the time, but sometimes the stock or your trades confuse their software and it gets stuff wrong. More often with the retail brokers of the world. IB has been quite good for many years now, definitely a cut above in accuracy.
in addition, as an option for an active day trader, you can elect mark to market accounting, which would avoid any wash sale related hassles. Whether or not that makes sense for your particular situation is a different question.
How easy is it to become a daytrader and allow Mark to market transactions, I'm sure you have to show legit reasoning behind a daytrader type status title