I can answer the last question about Ultiboard defaulting to copper top routing as indicated by the 10 in the spreadsheet. If you are doing a transfer from Multisim, goto the spreadsheet under the NETS tab and scroll to the right to where it says Routing Layers. Change all of them to TOP and then back to what they were before. This is the only way I know of to keep the transfer from defaulting to copper top only.
This technique was found by one of the NI Support team a while back. I have tried it and it seems to work. This is no guarantee that it will work all the time, but it is better than changing this everytime in Ultiboard.