When I export from Crystal Reports, any fields that are marked as Can Grow
are merged with an otherwise blank row below them.
This completely messes up
I always get a lot of problems while exporting crystal report to excel, I always got the same problem you have encountered.
I solved that problem by exporting dataset (report datasource) directly to excel, this solved all the issues, I've encountered.
Please refer to this link for Export a Dataset to Excel.