The lateral direction of a cartouche being reversed by modern publishers is immaterial because you always read hieroglyphs towards a face. In other words, the meaning never changes no matter which direction the word is presented in LATERALLY.
Vertically, inscriptions are always read from top to bottom and any such reversal would strike a reader as being wrong because the cartouche itself would appear "upside down" - it is never presented in this way on any monument.
For aesthetic reasons, though, such as the amount of space available to the ancient scribe or sculptor, glyphs which qualify the sound of a biliteral or triliteral consonant sign can be added or removed laterally where space either needs to be filled or where space is tight and so abbreviated forms would be used.
Above: The various 'spellings' of Ramses.
I hope that answers your question. Should you want me to elaborate, I am happy to do so.
Post Edited (05-Jun-14 18:54)