atomica's definition of haplology is interesting

"The loss of one of two identical or similar adjacent syllables in a word, as in Latin nûtrîx, “nurse,” from earlier ·nûtrîtrîx."

given this, i think the preferred pronunciation of 'haplology' would be "haplogy".

a related phenomenon would be epenthesis, which is the insertion of a sound in the middle of a word; i witness it quite often in my children's speech, as they are striving for pronunciation of difficult sound combinations.