What is this on the radar?

[chem]

First if i have posted this in the wrong section sorry this is my first post. I live in Adealide South Australia could someone explain these next 2 photos. At one point when viewing its altitued went as high 85,ooo feet. Thanyou.

[Mike]

Transponder error. The transponder is sending random positions.

[chem]

Thanks Mike. Thanks Mike for clearing that up for me.