I would say that's quite normal - Your feed file often won't show up when you look at uploads.google.com just after submitting a feed. Then it might show up (briefly) before it's removed again for processing.

Providing your feed filename is named correctly it will have gone onto Google's system and will be awaiting processing. Give it a day or three and see what happens - especially if this is your first feed - Google will have to approve the feed.

Best not to submit any more until they email you to tell you the outcome of this feed otherwise you risk re-starting the approval process.

Just peek in your Googlebase admin area now and again - it should show up there eventually, plus they'll email you. They can be slow approving feeds sometimes - maybe due to maintenance work or updates to their system, or perhaps because they have a lot of feeds to approve.

You'll get there