I am the offending party who's struggling with SIMs import.
I am using a decimal grade set which accepts levels in the format 1.0, 1.3, 1.7 etc for level 1c, 1b, 1a etc. I have been using the system as it is currently set up for about 5 years and all has been well. I have been able to import data with the *.0 showing correctly and with the data arriving in the correct places. Upgrading to Windows 7 and Office 2010 seems to have coincided with the problems mentioned. I have changed nothing in SIMs (who knows what Capital have done! We have SIMs update sent to us by the LA and we're currently at version 7.142, build 28, database build 3.61.778). I am now having to type all data in manually which is not ideal!