I can't think of any workaround right now.
I would suggest manipulating node numbers to assist here. You could review the model in the input processor and add, say, 5000 to all the nodes that are buried. Then when you get to the buried modeler you could clearly see what needs to be "buried".
I oftentimes break the pipe that enters or leaves the soil to mark the entry/exit point, with a node increment of 10, this new node can be set to end in "5", thus identifying the node to start or end a certain soil model "number" in CAESAR II buried pipe modeler.
By the way, I would also suggest changing initial buried pipe node number increment to 100 rather than 10 so that all added nodes remain in sequence. (This is for the benefit of the human reviewing results, not for the program.)
Again, my suggestions here are workaround. I will add your question as additional background to our "to do" list.
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Dave Diehl