"that has occurred for" -> "over"

In the new form, the 1st is definitely wrong. The 2nd is correct in the same way as before, as an implicitly formed relative clause.

I think the trailing adjective formation is actually a relative clause: "reports [that we have] received". In casual speech you'd definitely make those words explicit. In a scientific report, on the other hand, it's common to get rid of the pronouns.

They have the same literal meaning.

I think the payload here is in affected in definition 2: "assumed artificially; unnatural; feigned"