New week, new problem. The community here on these forums has been amazing at helping me with any issues I've run into so far. I've completed the changes on one board already! Now, i'm onto the second board, and I'm just adding one of the same components as last time, but to a different board. I went about it the exact same way as last time, only this time it's created loads of ratsnest in places that are not near the new connector. I don't think this happened on the last board, and takes what should be a one afternoon job, and is going to turn it into a few weeks (for someone like me). Did I do something wrong this time? Or did I just get lucky last time.
What I did:
-updated footprint of old connector in ORCAD Capture by creating the footprint in pcb designer.(same number of pins)
-create netlist from newly saved .dsn file.
-open new .brd that was generated in PCB Designer.
This created LOADS of ratsnest. I then opened the original .brd file in pcb designer and selected everything in general edit mode and selected "unfix". I remade the netslist now, and there are still all sorts of new ratsnests, but not as many as the previous export.