I have heard people have had to call them and get them to process your order via actual person. Also, I am sure they have something like a default setting or something so you can trade it. I personally would drop them as a broker if they are limiting you like that. Kind of like you have a checking account with Wells Fargo but they won't let you buy alcohol with your account. Stupid. E trade will not do that to you and have been pretty good for me.
I use tdameritrade simple and easy 6.95 a transaction that's all they charge. If hemp keeps going up a penny a day that's ok by me progress is better than relapse.