Actually this is not the first time I see this. I've just been lazy to report it. But this one was right off of start so I stopped it and grabbed the log. I have keep 2 of everything above IV 90. so it transfers anything below IV 90. But sometimes, when it catches one, it transfers both.
Here it is..also, when catching the new one, there were only the IV100 left in my inventory. When it transferred both, I had no more ekans
Strange, might I suggest just picking top IV for now, and then you can manually select on CP later. Also if you find the perfect ones to keep favorite them, and they will be ignored from the transfer list