Since I've been using Mendeley to manage and extract metadata from my PDFs, I've come to notice that authors are sometimes denoted with all their initials and sometimes with just one. I assume this has to do with different journal's rules on denoting author's names. However, this makes a mess in my author list in Mendeley, as the same person may be known under two or even more names (e.g.: "Last, F."; "Last, First"; "Last, First M,"; "Last, First Middle").
If, for completeness' and tidyness' sake, I edit the author fields to always have the most complete name of the author available to me regardless the journal the author published in, I inevitably will change the way I cite them. For example, an article from a certain journal only uses the first initial:
Last, F. Article Title, Journal name, x:y (YYYY), pp. xxx-xxx
After I have "updated" my authors, it is possible my citation includes also the second initial, i.e.:
Last, F.M., Article Title, Journal name, x:y (YYYY), pp. xxx-xxx
So my question is: am I incorrectly citing the article when I include more complete information about the author's name than is given by the journal article itself?