at least 80 credits at SCQF Level 10, including the dissertation, are at 70% or above
Doesn't it mean that 40 credits + dissertation (which is another 40 credit) should be above 70%
I interpret that to mean you need at least 80 credits including your dissertation where they are all 70% or over, not an average. So you needed to get a first in your dissertation to get a first class overall. My uni had a similar policy where you had to have a certain number of credits being 70+, not just an average of a 70 overall
at least 80 credits at SCQF Level 10, including the dissertation, are at 70% or above
Doesn't it mean that 40 credits + dissertation (which is another 40 credit) should be above 70%
Also you got 60 credits at level 10 with 70 or more, not 80 credits. It seems to me that you would've needed your dissertation + 40 other credits at level 10 with a score of 70 or more, which you don't have.
That's a harsh policy though considering you got 73% overall. What uni is this?
at least 80 credits at SCQF Level 10, including the dissertation, are at 70% or above
Doesn't it mean that 40 credits + dissertation (which is another 40 credit) should be above 70%
That's right, you need at least 80 of your credits to be at 70% or more. This has to include your dissertation. Because your dissertation was not over 70%, you didn't get a first. If your dissertation had been 70% rather than 67%, you would have gotten a first.