The export tool here seems to be working "as intended", so the most likely problem is that the other sites are using different set identifiers than we are.

The set identifiers being used in the export here for those three sets are:

com.wizards.ddm.bloodwar
com.wizards.ddm.unhallowed
com.wizards.ddm.night_below

Assuming the problem is the set identifiers, you can edit the file that is exported from the hw_list manually to get it to import into those other sites properly.

If you export your collection from the other sites (filling in at least one mini from each set if you don't already have data for those sets entered), you should be able to figure out what they are using for the set identifiers for those sets and replace them in the file you exported from Maxminis.

For example, I think the Hordelings set identifier for Blood War is "com.wizards.ddm.blood_war" instead of the "com.wizards.ddm.bloodwar" that is in the Maxminis database. If you search the text file exported from Maxminis and replace "com.wizards.ddm.bloodwar" with "com.wizards.ddm.blood_war", your Blood War minis should import correctly into Hordelings.

There was an attempt to get the set identifiers standardized between sites a while back, although I'm not sure if any changes were made elsewhere. The changes have yet to be implemented here, since "com.wizards.ddm.blood_war" is one of the corrections we needed to make .