OS: Windows 10
Browser: Google Chrome (latest: 47.0.2526.111)
There appears to be some quirky behavior with the bullet feature. If you have some lines of text that are separated by pressing enter (not shift enter), and then do a select all (either from right click context menu or ctrl+A) and then press the bullet formatting button, only the last line will get a bullet. This behavior is different than selecting all of the text and pressing the bullet formatting button.
This can be repro-ed on the demo page for the editor control