I don't know where you were the day of the event but that graphic was all over the media...it was the only one I saw plotting location. Like I said don't ask me where they came up with that...I'm just an observer. I didn't make the graphic. Now if it was reported over Cataliina wouldn't you think they would have put the yellow dot right on the island? Seems like a good idea to me.
The "plume" was never reported over Catalina Island -- nor has anyone claimed that it was. The "plume" ended before the object passed over Catalina -- because UPS 902 passed from a region where persistent ice crystals were formed into a region where only volatile water droplets were formed. (Or, as Levyas said, it "detached from the plume".)
It appears that you have a lot of catching up to do... :-)