As yet I can’t suggest a solution to Vera but I would like to post in this thread for asking a question, related to this thread title.
I had been studying for some time in this thread ( Vowel / Diphthong length ) and I ended up to the wikipedia “correption” site where I read an example:
Homer uses correption in dactylic hexameter:
Ἄνδρα μοι ἔννεπε, Μοῦσα, πολύτροπον, ὃς μάλα πολλὰ
πλάγχ> θη> , ἐπεὶ Τροί> ης > ἱερὸν πτολίεθρον ἔπερσε·
— Odyssey 1.2Tell me, O Muse, of the man of many devices, who wandered full
many ways after he had sacked the sacred citadel of Troy.
— translation by A.T. MurrayHere the sequence η ε in bold must be pronounced as ε ε to preserve the long—short—short syllable weight sequence of a dactyl. Thus, the scansion of the second line is thus:
πλαγχ > θε> , ε | πει Τροι | > ης > ι ε | ρον πτο λι | εθ ρο νε | περ σε
https://en.wikipedia.org/wiki/correption
I know that this is most likely not to be attic dialect.
Nevertheless I would like 
to ask anyone that mastered attic dialect pronunciation or is certain about her/his pronunciation skills in this dialect to explain to me why eta once is marked like pronounced as “ε”(“Ae” e.g. Aegean) and the second is marked as “ης”(implying that the two syllables containing the same vowel are to be pronounced differently)?
Truly, I hope this is not another typo ! 
