AP Invoice freight charge lines not showing in Landed Cost Management after running the Matches Inte

When running LCM as a Service app and as a pre-receiving app, everything is working fine - except after validating the invoice then running the Matches Interface Import Program, I am not seeing the charge lines I've entered in AP for freight in LCM. I should see these charge lines displayed in the "Billed" column on the Shipment Hierarchy page in LCM. The item cost that was matched in AP is there, but not the corresponding freight or insurance charge lines.

Can someone please shed some light on this issue?

Please let me know if anything I've written here is not clear and I will gladly elaborate, thanks!