While the routings may say that an Easter Island stopover is OK one of the other rules is maximum 2 transfers each way which makes an Easter Island stopover impossible. 1 transfer has to be in SCL and if you have 1 in IPC you must have 1 in PPT as well for a total of 3. Similarly a PPt stopover should only work if you get a direct flight on to SYD ie EZE-SCL-PPT-SYD.