flightaware.com/live/flight/UAL1 … /KDEN/CYYC
I found this one some what interesting. What causes an error like this?
Charter Member with one post. You sure have been in the shadows. 
What you see is the result of two aircraft with similar flights #'s airborne at the same time. FA plots the feed for both aircraft simultaneously and it shows up as the zig zag you see.
May be paired with a flight ’ like ’ this one from CYOW to CYYC.
flightaware.com/live/flight/ACA1 … /CYOW/CYYC
or this one
Thanks for the info!
And I have been in the shadows, it never occurred to me to check our the forum here. I’m having lots of fun going through all these flights!