The ordering of citations within an in-text citation is determined by the citation style chosen. For instance, the APA style orders citations by author and then by year whereas the Chicago style does not do any ordering. Unfortunately, it is a little difficult to determine which styles do which before trying it (you would have to look at the CSL code).
The "Taylor & Francis - Harvard X" style is an example of a style which orders papers chronologically.
For styles which do not reorder the citations, you can drag and drop the blue bubbles in the citation add/edit box to create the order you prefer.