The recent hotfix to ScriptX has fixed an issue with selecting a paper size. We try and be as helpful as we can in matching the string describing the papersize to those available but the algorithm had a problem when there are multiple matches for the requested name and longer names come before shorter matching names – it would match the long name.
So, for example you request “A3” and there is a paper size “A3 – Large” that enumerates before “A3”. The “A3 – Large” would be selected.
Few printer drivers do this but if it affects you then upgrade to ScriptX 126.96.36.199 or later.