Hi Stephen,
Yes, this is my fault. The summary function incorrectly summarizes a witness in the fully lac section if it doesn't appear in any 'normal' reading, e.g., a, b, c, etc. This is problem especially for versional data. It's on the top of my to-do list to fix.
For now, you can select the little 3 dot menu in the upper-right corner of the apparatus display window, select Style, and then choose Verbose. This will turn off the fully-lac summary. Again, our apologies.