UTD2025CL oscilloscope - help with these displays
1) There are several waves plotted on top of each other. If you want that: it is normal. If you don't want that: try adjusting the scope settings such that you get only one trace. For example use "single shot" mode.

2) It might be normal, depending on how you set the triggering to work the scope might not trigger reliably making it wait in between. If you don't like this: adjust the trigger settings such that you get reliable triggering.

General remark: an oscilloscope is a complex (to use) instrument, it requires practice. Don't be afraid to try changing some settings to see what they do. Read the manual of the oscilloscope!

Don't ask "is this normal" because if you set the scope in the wrong way you will get a weird/wrong/no plot on the screen. That is normal. You have to use the scope properly to get a usable picture. That also is normal.