Problem 1: That was a nasty little bug. This has been fixed in the latest download to not recursively export search results that have the search item in the results.
Problem 2: Exported filenames are truncated to 50 characters, because Windows is limited to total folder+filename length of 260 characters (even with long paths enabled, most applications don't support them), and especially when exporting a tree structure, it can quickly exceed the max path length. But in the latest download, this is now configurable via reg setting
MaxExportFilenameLength, allowing you to more easily shoot yourself in the foot.