Smartview retrieve file gets very large on save

Summary: Hello, We have one user, when he Smart View retrieves on 5 different template files, the retrieve works fine, but when he saves, the Excel file will grow to a very large size. For example, one file I saw went from 1 meg to 53 meg. The data was the same, there were not any additional rows added or anything. It's just a retrieve and then when saving, it grows very large. This only happens to one user. This will not happen to other users who retrieve/save on the 5 template files. The user has 64 bit Office and Smart View.