Nothing found issue

[Pastelaso]

Hello,
I'm trying to figure out why is it that some times my cameras, specially my main one on my driveway..it will detect a car or delivery truck that comes in at 92%, but it will delete the motion as "nothing found". Then, later on, it will detect fine.
Trying to understand which setting I need to adjust.

These are my settings, which in my opinion are very sensitive according to what I have been reading about those numbers.
Any idea as to why would Blue Iris cancel the motion as "Nothing Found" when it detects the truck at 92%?

 

[actran]

You need to add truck to "To confirm" list if you want BI5 to mark it as a confirmed event.

 

[Pastelaso]

You need to add truck to "To confirm" list if you want BI5 to marked it as a confirmed event.

so adding truck to the "mark as vehicle" doesn't do that?
What is that section for then?

 

[Pastelaso]

Also.. it didn't detect the driver either...well, it did..but it cancelled it as nothing found.