Right now i'm schrinking and formatting those partitions
That's nonsense. Not the partition size but the partition location is the problem.
Kickstart 3.1 can only access storage which is in the first 4GB of the drive.
Imagine the partition diagramm in HDToolbox. Think of a red line 4GB from the left side. Everything to the right of this 4GB mark cannot be accessed without special software, no matter how big or small partitions are.
OS 3.9 comes with this special software, but you have to use it. It does not apply itself magically.
Boot from the OS 3.9 emergency disk, run HDToolbox, go to Partition Drive, click on Add/Update and update FFS to version 45. Or use SFS instead.
After a reboot the partitions above the 4GB border should be accessible safely. Use Check4GB to be sure.
If you boot the HDD with WB 3.1, all the partitions which cross the 4GB border or are above it should show up either as NDOS or not at all. That's correct because they are not accessible at this time. You need OS 3.9 to access them.
Bye,
Thomas