I'm looking at the TSS/IF report and can see that the TSS and IF is taken as an average. I don't see any point in this.
The TSS could be useful if it was done as cumulative. It serves no purpose showing it as an average. If you do alot of short activities, then this will make your TSS average lower. If you do a ride with TSS of 500 on one day and later that day do a ride that is 10, then the TSS will show 255. This is not the stress score on your body for the day
I've looked at your forums and people have raised this issue dating back 6 years and the reply comes back that this is by design. How about changing the design based on the feedback? What is the reason for the design? Having this as cumulative allows you to compare your training stress over periods of time. e.g. you may want to target a cumulative TSS of 500 for the week or see the TSS total rise slowly each week. I'm currently looking at my graph and can't get any value out of it as it doesn't tell me if my average TSS has been impacted by alot of short rides one week/month compared to another. When you think about it, it's like having average distance per ride as a report instead of total distance. That would be pointless.
Note, trainingpeaks, which is where TSS comes from uses the accumulation method. Coaches also set cyclists weekly TSS targets.
IF, obviously can't be done as cumulative and probably should be dropped from reports or separated from TSS.