Previous Import Not Shown on Report App

I'm evaluating the Basic Version. I had done an Import of 721 records, and everything came through, except there were some records that had errors, which I fixed. When I tried to re-import the corrected spreadsheet it wouldn't let me because it said I had too many records. I called support and he told me I could only have 1000 records for free version. He said if I wanted to re-import that I would have to go to the Report app, select all of the records, then delete them. Then, I could re-import the corrected spreadsheet. However, when I went to the Report app, it didn't show any records, and it said there were no records to report, yet, when I try to import the spreadsheet again, it still gives me the same error. How do I fix this?

Thanks,

GPL