I ran a GEDmatch multi-kit analysis and got a report for matches for 'Joseph's' kit for Chromosome 12 that identified two matches ('Laura' and 'Charlotte'.)

When I ran a multi-kit analysis for 'Charlotte', 'Joseph' and 'Laura' both showed up.

However, the strange thing I notice is on Chromosome 12, in the first report I get several matches that span as much as from 1,359,590 to 5,316,226 (about 12.3 cM). In the second report, I get Edna matching Charlotte from 1,517,192 to 3,941,530 (7.58692 cM).

The segment matches Charlotte from the first report, so why doesn't Edna appear in the first report? Is this a bug?