Hm, don't confuse with this short Build Numbers do a deeper look.
Look at real Build Number (Windows platform)
Code:
Version | Build Number
--------------------|---------------
R60 HFA 02 | 630000044
R60 HFA 02 Hotfix 1 | 630001003
...........................^
I think this is also the version you can query with SCV Check.
I agree that's confusing in SmartMonitor since it shows only the last digits as Build Number.
Also something I miss are these Numbers in every Release Note they are in the R60_HFA2_hotfix1 but not in R60_HFA2.