I'm having multiple touches recorded and can't do things like scroll up and down because of it.

[scodeth]

This is when I'm not touching it. I went to developer options and enabled "show touches" to show you what I'm talking about. 3ronUA9 add this after imgur.

Is there any way I can stop this from reoccuring?

This may or may not be related, but I cracked my phone screen at the bottom. Could that possibly be causing this?

 

[SpookDroid]

The crack could possible have damaged more than just the screen and it could be causing the multi-touch issues. Also if there's humidity that got inside or if there's water/humidity on the screen, it might be registered as a touch input. But from your picture and since it's right at the bottom, I'd say whatever cracked the screen damaged something else (digitizer, circuitry inside, loose wiring, etc.).

 

[scodeth]

So do I need to replace the digitizer as well as the glass screen?

 

[SpookDroid]

If that's what's damaged, yes. But again, no way to tell unless you actually inspect it. I mean, it's a very likely shot that it's just the screen and digitizer, but there might be further damage underneath.