Problems when using steinmetz package with cancel package.

I've been using the cancel package for a while, and I like it very much. This weekend I found the steinmetz packege that interests me as much as the former, but when I use then at the same time, the lines and the arrows of the \cancel and \cancelto macros became misplaced. 

The steinmetz package needs the pict2e package, and it's seems to me that this package when loaded redefines the references of the picture environment.

Does anyone came across this problem, and does it have any solution?

Jether Fernandes Reis
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