If the steps to get you out of "Safe Mode" don't work, then I would have to wonder if there is something wrong with the volume button on your device. If there is, then there is no way to stay out of "Safe Mode" until you get the button fixed.
I am also including, just in case you missed something, the steps to get out of it below. Can't hurt to try (as long as it isn't a button issue).
To get out of Safe Mode, please try the following.
1. Touch and Hold the "Power" key.
2. Tap "Power Off".
3. Once the tablet is off, Touch and Hold the "Power" key again to restart.
The tablet should now be out of "Safe Mode".
If the "Safe Mode" is still running after you restart your tablet, I would then check to make sure your "Volume Down"...