My Macbook Air trackpad keeps switching between left-click and right-click randomly?

Right so I got this shitty MacBook Air for Christmas and I use it sometimes for playing Minecraft. If I try to use my attack button (left-click) sometimes it will act as if it right clicked. Even if I plug-in a wireless mouse the problem will still occur where left-click will act as right-click. My controls are all right in the controls setting, and I tried to go through the System Preferences and change some stuff up but it didn't help. Please help fix this.

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