I've recently been learning to code with Java and specifically for Android. All my SDKs are set up fine but Eclipse is giving me a huge problem that makes it impossible to code. I will write code, and it works, but when I go to edit the code, some issues arise. When I highlight parts of code, old code will appear in the highlight area, out of order and mixed up. When I click to a certain line. Different lines of code show up or is shifted to different spots without me doing it. I've reinstalled Eclipse and everything but nothing has helped. Any advice?