When my Centipede runs, it's opening the accessibility link

This can happen when the log in screen has already selected the first drop down (i.e. it is outlined in blue). To resolve the issue in a one-off instance, click somewhere else on the window that takes the cursor off the first drop down. If all your devices have the same element already selected, you can modify the code on line 139 to use the number of TAB presses required by your devices.