So I'm not really certain if whether is a known bug, unknown bug or even intended. I thought I should report this.
So, I have two Gyarados. I had both of them in my team, earlier this day. Then, I thought I'd check out the PC to see if I have any more Gyarados. To my surprise, I had two more. When I viewed them, I came to know that they are the same ones I have in my team. I tested out thid with many other Pokemon and the result was the same. Thus, I guess this is a bug and shouldn't be happening. Pokemon which are in our team shouldn't be there in the PC. Oh yeah! By the way, this bug occured when I used the search bar in the PC. When I search for a Pokemon in my team, it's also in the PC.
Thank you.