Incorrectly regarded as goofs
When Blaze Sr. is crashing, in the rear view you see him clear the launch ramp and start to fall to the side and off of his bike, both still well within the flaming hoop. When Johnny rushes in and sees the aftermath the hoop is severely warped at the top and a piece of it can be seen at the side of the ramp. The bike is seen further down the ramp from Blaze Sr. and couldn't possibly have done that kind of damage. Mephistopheles was there when the show was taking place so he could have caused the damage. As he told young Johnny Blaze, he couldn't let Barton come "between them".
During the highway scene, both directions of traffic are on the same side of a divided highway, with no cones between them. You can tell by the dashed white lane separating line. When rerouting traffic, there should be cones separating the lines of traffic moving in opposite directions, to make sure the drivers know to stay in their lane.
When Ghost Rider takes Blackheart's souls, images of the previous kills he made are seen in the fire. However these kills would be credited to Blackheart's own soul, which is in hell (revealed the first time Ghost Rider tries to punish Blackheart earlier in the film). The souls Ghost Rider is taking are those of the villagers, and so the images that Blackheart would see in Ghost Rider's eyes would be their kills, not his.