Ver: 5.903
3dsMax Ver: 26
(https://i.imgur.com/QrXw4Qc.png)
Steps to reproduce: Wall Worm -> Importers -> Import Full MDL to WWMT
There are definitely limitations to the MDL > WWMT importer. Unfortunately, I don't have the bandwidth to dig into this particular problem at this time. You might try using Crowbar to convert the MDL into QC+SMDs and see if the QC import has better results.