Diagnosis
In DevStudio, ware import dialog is flagging example wares (eg water.surf.transfer-rs.hayami) as already present in workspace, which is misleading since they are in the example directory.
This behaviour is related with function WareSrcManager::getWarePath which looks into both workspace and example directories.
Fix
Possible quick fix: add boolean parameter to getWarePath function to include or exclude search in example dir.
The underlying question is to know if these wares should be imported in workspace, and how to distinguish the two versions.