hi, yep the spelling differences have all sorts of reasons. i just uploaded for you pg 1 of another one of my iliad editions, this one by Bolling 1950, Ilias Atheniensium: The Athenian Iliad of the Sixth Century BC, which tries to capture the iliad at an earlier stage than previous iliad editions.
http://www.freewebs.com/mhninaeide/Pg1Atheniensium.jpg
note the spelling of the 1st word in line 9 compared to your pharr version.
for more on the differences between iliad editions see chapter 6 of West 2001, Studies in the Text and Transmission of the Iliad, worth a read, cheers, chad.