I'm a little confused by these deffintions
- “Lemmas in Reference” performs as previously, giving hits on where a lemma is quoted from a Bible reference in another resource such as a commentary.
- “Other Lemmas” provides results for lemmas which are discussed in a resource but not quoted directly from the original source material.
In a guide for Ex 20, I get

The first lemma is OK but the second lemma is quoted directly from Deut 5.8 and is not the form used in Ex 20:4.

The first lemma appears to be directly from Ex 20:4 whilst I agree the second is OK as the one from which the first is derived.