Hmmmmm. Surely this company has sold a bunch of these, so if the flange is not aligned right, they would have already run into this. Before giving up, I would contact the mfgr. and see if they respond. Perhaps you got a bad one and they'll replace, or perhaps they have another workaround. Don't give up. Don't get discouraged. Don't quit. Most problems turn out to not be as bad as they seem at first.

AM.

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E70 2010 3.0 M57 AT Titanium Silver with Black Leather
E53 2004 3.0 M54 AT Toledo Blue with Gray Leather
E83 2008 3.0 N52 AT Silver Gray Metallic with Black Vinyl
E46 1999 2.8 M52TU 5MT Black with Tan Leather 250K+ miles (Sold, but not forgotten)