I'm not sure the files were uploaded to the server, because I'm not seeing them listed anywhere. It looks like you'd have to upload again. Try to make sure that the file names are unique so that they don't match the earlier uploaded scores.
Although before you do so, I should mention that it might be beneficial to do some editing to those files first. A program like ScanTailor would split and compress those files pretty easily, while still retaining much of the quality. Both me and Daphnis have experience with that program, and could help with editing if you're unable to do so. I was possibly considering helping upload some of the Mahler scores myself, but if you already have the scans and could get the editing done, that would save some time. I mention that because the Symphony No. 8 file is a bit large for what is normally uploaded here, and I noticed a small part of the comments were included on the first page of the score, which probably shouldn't be posted. Editing would allow that page not to be included.
Unfortunately, I'm still unsure of how many volumes can actually be uploaded. Anything published before 1986 would be free in Germany and therefore the EU, but I don't know how much the revisions affect the eligibility. Hopefully someone can clarify this because the Mahler editions would be a nice addition to the site, even despite all the troubles they present.