I love memories mist and I use a lot of it and it does "blob" which I don't mind for how I use it. You can try holding the paper at arms lenghth and point the spray bottle straight at the paper, some of the blobs will fall onto your desk instead of the paper. You can also blot the blobs with a paper towel to lighten the effect.
You could also try tranfering the mist to a different fine mist spray bottle. I don't know if it will clog the spay head, but you could try.
take a look of some of Elaine Barr's vids on memories mist
http://www.youtube.com/watch?v=tnoSIJLFJQY