Is it legal for my employer to send me both a W2, and a 1099-MISC without telling me before? They say its for commissions, but isnt that employment earnings on the clock?

I get paid a percentage commission for every job that we fulfill that was quoted by me. I was always on the clock while going out and doing these estimates, and they were part of my usual work. in pretty much every instance, going out to give these estimates was mandatory.