Total Posts: 867
First of all, please, make sure that you linked your simple products to configurable by IDs or SKUs in that file you used for import.
In case it was done correctly and this is actually related to backend issue, I can offer you free trial of Store Manager for Magento -
It is desktop solution, so using it you can handle import of your configurable products directly from your PC. Check this article on what is required to check to do it accurately -
In any case, it is alternative solution, however, might be useful for you.