AutoCAD Inventor :: Editing Bolted Connection Design Accelerator XML Data

I've got a strange situation regarding the bolted connection generator. For some background, I made another post a while back about editing the hole sizes for Flat Head Cap Screws so that the heads were below flush. That thread is here:

[URL]

Basically, I increased the countersink diameters Clearance.xls and then found that the Design Accelerator doesn't use that spreadsheet for its data source. More research led me to this file:
C:UsersPublicDocumentsAutodeskInventor 2013Design DataDesign AcceleratorTablesHolesAnsi Unified Screw Threads.xml

So I edited the diameters in this file and tested the design accelerator and everything was great. [I kept a backup of the original...]

Since then, another thing that has bothered me was counterbore numbers for socket head cap screws. The Cbore diameters don't match the tools that we have and the depths are always right on size. i.e. for a 1/4" SHCS, the bore is 7/16" diam x 0.250" deep. In reality our cbore tools are about 0.406 and we cut them about 0.265 deep to make sure the head is below flush.

I went in to these two XML files and edited them (and kept backups): Ansi Metric M Profile.xml Ansi Unified Screw Threads.xml

Everything seems to be cool, except for one scenario. When I create a counterbored joint for a metric SHCS, the cbore diameter is always 16.00 mm diameter and too deep, regardless of its size. I searched the XML file and what it's doing *does not* match the data in the XML file. I monkeyed around a little more and could not get the counterbores to come out right.

So at that point, I renamed all the files to restore my original backups to the "factory" ones. I assumed that I screwed up the formatting or something in the data table and I'd just try it again. However, even after I restored my backups and removed my edited files, the metric counterbores are messed up.

What I don't understand is that changing the file "Ansi Unified Screw Threads.xml" *did* update the holes for English screw joints. But does the DA pull data for metric joints from somewhere OTHER than "Ansi Metric M Profile.xml"? And if it does use this XML file, why isn't it working? The original data has been restored, but the behavior is not behaving correctly.

Inventor 2014 64-bit SP1
Win 7 Pro 64-bit SP1