Yo Ashley <img src="smileys/smiley16.gif" border="0" align="middle" />
Steps to reproduce:
1. Open up any Sprites animation.
<img src="https://dl.dropboxusercontent.com/u/7765312/C2/RenameGlitch1.png" border="0" />
2. Right click in the Animations list and add a new animation, and then select this animation.
<img src="https://dl.dropboxusercontent.com/u/7765312/C2/RenameGlitch2.png" border="0" />
3. Click the "Open" icon at the top right of the Animation Editor and load any image.
<img src="https://dl.dropboxusercontent.com/u/7765312/C2/RenameGlitch3.png" border="0" />
4. On the animation bar, right click and add another Animation
<img src="https://dl.dropboxusercontent.com/u/7765312/C2/RenameGlitch4.png" border="0" />
5. Type in a name for the animation and click off/hit enter. Volia, the name of the first animation in the list will get changed instead!
<img src="https://dl.dropboxusercontent.com/u/7765312/C2/RenameGlitch5.png" border="0" />
Also, since it's quite probable that this relates to the same bug, it seems that after using that "Open" button, if you click onto another animation, it will instead select the FIRST animation.
<img src="smileys/smiley41.gif" border="0" align="middle" />