I import products in VM sub-categories using RO CSVI 8.5.0. Each sub-category contains a number of products, arranged in an Excel file. Once the sub-category has been imported, it initially is shown as a category. In the next step you allocate the sub-category to a (sub)category. If the sub-category has been imported before you find the old sub-category with 0 products and the recent import with all the products. Deleting the old file finishes the process.
Since vm 4.0.7 this is no longer possible. The imported sub-categoriy remains a category and can not be moved. Returning to vm 4.0.2 resolves the problem.