Strange Mirror behavior in blender

Support Modeling
1

I got a model that had it’s mirror modifier applied when the model was completed, but when i try to manipulate vertices on the left hand side, vertices on the right hand side start to mirror my actions on the left hand side as if there is a mirror modifier still there. I have checked my properties panel to make sure i didn’t forget to apply the mirror modifier but there are none. This only happens in the middle finger

Does anybody know why this is happening or is it a bug?

I should mention again that during the modeling phase there was a mirror modifier but it was applied after the model was completed.

Thanks for viewing

2

See if you have X-Mirror enabled in the Mesh Options pane of the toolshelf (T panel).

3

OH MY GOD!!! That was it! I spent weeks Searching every corner of the internet trying to figure out why this happens. I even did my model over again.
Thanks for the speedy answer Stan Pancakes!