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Make e a class variable. Then all methods can see it.
Recommendation: Change the name to a meaningful one vs a single letter.

Yes every time you define a variable in its own scope, a new object will be created.

If the e.commit() call uses a different object than the one with the data, then the data won't be there.

The...

You need to move the definition of e to put it in scope for the savePosition() method.