Yes this can be a little confusing, each coil pack has 4 wires, a power, a ground, a igt and an igf signal, the power and ground energize the coil, igt and igf are the computer signals to fire and to tell the computer that the coil did fire. When igf does not send signal back it sets the p1300 code, you need an osciloscope to check these 2 signals.
Also be aware of a few more things here:
1- the catalytic converter is VERY sensitive on this car and very expensive, plan on a $800 part if you keep running this engine with a misfire
2- spark plugs- you need to be sure you used IRIDIUM spark plugs, required by this system
3- still needing a scan tool here, unplugging a coil is not the proper way to check for a misfire, you need to read the misfire data list to determine this.
I would take that new coil and move it around to each of the 4 cylinders to see if this clears it up if you have no scan tool access or install a spark tester to "see" spark.