According to the current descriptions,
citations Queries related to citing or referencing published or unpublished sources
citation-style On the syntax and formatting of citations and reference lists according to a particular style guide (e.g., Chicago, MLA, IEEE, APA).
They seem almost similar and it seems like users cannot differentiate their standard use. Many use both in the same time; in such a case the tag citation-style should very well define the question's purpose.
Should they be treated as synonyms, or should I just go through the trouble of re-tagging the questions according to their true descriptions (I don't see any badge for this; [badge:Copy Editor] excludes tag edits)?