Sorry, your files are in a proprietary format. I find two files but I do not have any program that can read them. (Nor could I read your post #1 attachments.)
Can you take screenshots of your images, and attach them as graphics files?
* This suggests ringing in your coil. Is there a capacitor close to it? Creating resonant action?
* A coil generates its own current for a brief time after you shut off its current flow. This can result in high voltage spikes, particularly if it suddenly sees high impedance.