Migrate from Lightroom issue

I have already opened a ticket, but I would like to know if I am the only one to be afflicted with this issue. 

In Lightroom, I created a catalogue with just one year – my quietest, and migrated this catalogue to ON1. I was expecting just my one year – D:\Pictures\2010 to be included in ON1’s catalogued folders, but my whole drive was included, although only 2010 was actually being updated. I did try to remove the extraneous folders, but the option is greyed out, and I could only remove from the top level D:.

My catalogue in Lightroom:

This results in this in ON1.