Lemmas: σῳζω AND σωζω?

Paul Cable

In Morph Search, when I begin "lemma:σω. . ." I get suggestions both for σῳζω and for σωζω, and they seem to be counted as different lemmas in the results when I include both in the search. It's happened in Josephus, LXX, and Philo. Sometimes the results overlap, sometimes not. Sometimes the overlap counts as 1 in the result count, sometimes 2. Am I missing something?  

Anthony H

Iota subscript, identifying a long diphthong among other issues.

 EDIT:

I found this within Logos5

The Iota Subscript

For certain words an iota is written under the long vowels α, η, and ω. This iota is called the “iota subscript” and does not affect the pronunciation (i.e., ᾳ, ῃ, ῳ are pronounced as α, η, ω). It is a scribal convention to indicate a letter that had been pronounced at one time.

Swetnam, James. An Introduction to the Study of New Testament Greek. 2nd, rev. ed. Vol. 16/1. Roma: Pontificio Istituto Biblico, 1998–. Print. Subsidia Biblica.

AND

In some instances, the long vowels α, η, ω are combined with an ι. In this case the ι is written beneath the vowel (ᾳ, ῃ, ῳ) and is called an iota subscript. Since the ι is not pronounced, these combinations are often referred to as “improper diphthongs.” Several words containing an iota subscript are found in the opening verses of the Gospel of John, which are used in the exercises to this lesson (see §11): ἀρχῇ, αὐτῷ, τῇ, σκοτίᾳ.

Black, David Alan. Learn to Read New Testament Greek. 3rd ed. Nashville, TN: B&H Publishing Group, 2009. Print.