Regarding "why a certain person says ..." - I can't speak to the thought processes of others. You would have to discuss that with that person, perhaps with a reminder that wikitree values collaboration, which may or may not have taken place.
Regarding your sources: It appears that one of the problems with that profile was the editing done after the merge of Shearin-130 (assumed to be a profile you created) into Alston-605 in which your references/sources were deleted or incorrectly edited. From the information below (assumed from the change logs), it appears the post-merge editing was improperly done.
It appears the sources in Shearin-130 were references to a familysearch tree (https://www.familysearch.org/tree/person/details/9F3T-WVV),
The first reference, an unsourced family tree, though it isn't considered to be a "source," does provide information for further research. It could've been kept in the merged profile and labeled as such.
The other two references provide information that the current profile doesn't provide a source for - e.g., Amy's LNAB, birth date & place, some of the info for the children, etc. Those references IMHO should've been retained in the merge.