I forget, can adaptations be set to automatically occur? I review all my adaptation suggestions before accepting them so I’d recommend doing that. You never have to go harder if you don’t really want to if you have the ability to review prior to accepting
The other thing is that by doing a 7.8 workout outside of the plan, you set that as your baseline. Adaptive training is going to put you in a positive trajectory based on your most recent completed level. So, in essence, you manipulated the system and made the recommendations harder. I did this at the start of my CX training, on purpose, because my anaerobic level was 1.0 prior to the plan. I wasn’t changing my FTP or anything, so I independently did a 4.0 level workout to get the level to where the workouts recommended would be above 4 and progress me in a way that I thought 1.0 would be too slow.
Just a couple of thoughts