the agree to trade button and the change masteries/runes button

The other day, i was playing ARAM, and i rolled Sona, an excellent choice in any game version, as I was choosing my masteries, a bard offered to trade, and being next to the change masteries/rune pages buttons, i accidentally agreed to the trade. why are these buttons in the same spot? surely i'm not the first to notice this? please fix, thank you in advance.