i definitely agree he is saying basically nothing, right from the beginning of the case. Football coaches and politicians are very good at using a lot of words to say nothing, his statements would work for either.
I don't see the lie in your post, though. I think it's clear the family was targeted- other people live on Union Hill rd and are not dead, the location of the eighth victim was not close to the first 7. They based the targeted comment on that alone, assuming their was no note left at the scene that said "we targeted this family."
The only problem I can see with DeWine's statement is he should have said no information on an ongoing threat, or no information on a threat to the remaining family members. He also can't be contradicting himself based on the sheriff's comments vs his comments. Contradicting the sheriff, yes, not himself. That's really just semantics, though, if you believe the statements are contradictory. If "the family was targeted" was an assumption, which it appears to be, what he said isn't contradicting that. He's simply saying they have not uncovered anything to indicate an ongoing threat or to confirm the original targeting, other than the dead bodies.
Officers at at the funerals are serving two purposes- the primary reason is probably to observe the family and friends. Secondary would be that if they weren't there and something happened (family member accuses someone and attacks them) they would get crushed for not being there.