So, the first bug is this:

This glitch occours if you have VBOs disabled. So to fix this glitch you just gotta enable VBOs.
The interesting thing is, that these weird things are from monsters near you, so if you are near icefiend then it will be blue, but in my case I was near Kalphite Soldiers and it was green,brown and etc.. cuz they are too.

The second bug is just a small bug:
It says Kalphite Soldierss, but it sohuld be Kalphite Soldiers. Not sure if this happens with every monster.