When you give it the mistyped file name or does it still do that after you've corrected the typo?
It's very hard for us to guess what you are doing. Can't you please just copy the commands and error messages here instead of describing them in your own words? Most of the time when you get unexpected output, the reason is that the input is different from what you think it is. Describing to us what you think your input is does not help.
Anyway, if you want to verify the images you can compare the MD5 sums with mine:
$ md5sum SWI9X30C_02.33.03.00*