Right I read it line by line. here's the line that you want to know:

"3.1 Coinbase may cancel or reverse potentially high-risk buys or sells of bitcoin, including those made using reversible payment methods."

However by no means was my order high-risk. I've abided by everything. Level 2. Gave them every info they want. Did transactions amounting to the thousands before with no problem. So yeah..... :/