My problem is on my schematic I did not connected a pin to another but on the PCBnew the pin is somehow connected to a pin which I do not want to. I post an image about the matter.
Which pins are connected in pcb_new? Maybe use the highlight net tool to show us that. (the 4 pads you show in your screenshot all are connected to a different nets. Did you show the “corrected” version?)
And you might want to show a larger area of the schematic such that we might be able to see a problem.