A member of the PCT Listserv (which you should join) asked:
WIPO (or the ISA) changed the title of my PCT application. But I can’t work out when/where/how/why it was done. The A2 publication has one title (the one we gave it). The A3 publication has a slightly different title. Interestingly, the change narrowed the title in a similar way to the way the Written Opinion said that the claimed invention should be narrowed. Any suggestions?