Acoustids often match to more than one recordings, these recordings may be
1. Same recording but incorrectly exists as multiple recordings in MusicBrainz
2. Different recording of same song
3. Different song
the NumOfSources is a good indicator of the best match but is not always correct however when only matching a single song we have less checks and balances than when matching a number of songs to a release so we should err on the side of caution and only consider the recording with the most sources even if this means that a few songs dont get matched when they could have been,
it looks like that this issue is not working properly repaired with Jaikoz 8.2.6 Build 1149 15.07.15 because I have here a case with the song "Shep & The Limelites - Daddy's Home" acoustid 0e2aecca-e4bc-45a9-864b-5adc16a49e47 (sources = 31), which is matched to "Cliff Richard - Daddy's home" and had the same acoustid, but sources = 14.
After deleting the acoustid for Cliff Richard, the song "Shep & The Limelites - Daddy's Home" is matched.
Are you sure only one song was being matched rather than a grouping ?