Export archive missing package after importing using sdk cognos 8

[ora1001]

Cognos 8.4.1...
trying to import a package and modify the model and then export the package... which is then copied to a production cognos server..
trying to do this using .net c sharp sdk.
Some how when exporting, the archive is missing model package.. The column "in target content" check box is blank or empty...
all the other folders appear fine when imported...

some how some objects still point to old versions still after export and import.

the same works if i manually import --> export --> import