I've been noticing that lemma searches don't return all the results. Whenever there is a textual variant marker between two lemmas being searched, Logos won't return that text as a valid search result. For example, in the following three searches of The New Testament in the Original Greek: Byzantine Textform 2005, with Morphology. Logos Bible Software, 2006, Matthew 16:20 & Acts 9:34 should show up every time.
When searching for this phrase, no results are displayed: lemma.g:Ἰησοῦς BEFORE 4 CHARS lemma.g:ὁ BEFORE 4 CHARS lemma.g:Χριστός

When searching for the following phrase instead of a lemma, both passages show up in the results: "Ἰησοῦς ὁ χριστός"

When searching for the following lemma phrase, Acts 9:34 doesn't show up: lemma.g:ὁ BEFORE 4 CHARS lemma.g:Χριστός

In both of the lemma searches above, a textual variant seems to be preventing proper search results.