How do you know? (Not being devil’s advocate, a genuine question)
It looks like you are conflating “What won’t work for me” with “What won’t work”. Now I agree that a four week build block before a recovery week is likely to be tough, I’m not sure I could complete it with 100% compliance, but that doesn’t mean it’s wrong.
I’ve done a couple more scenarios: extending the period available by a week changes the Build phase to be six weeks long with a 3W:1R:1W:1R layout. It looks like the combination of the specific duration between now (well Tuesday) and your event AND choosing Beginner or Intermediate leads to a five week Build phase with 4:1 work/recovery ratio. So by setting the start date to last week you’d get the above plan.
Actually having five weeks for the Build phase is awkward: it’s either 4 work : 1 recovery or 2W:1R:1W:1R. The latter might have too much recovery for most people to be effective unless that isolated week is very hard which in itself creates problems.
I think it’s worth raising this - Build should either be four weeks (3:1) or six or more weeks. TR do have the monitor compliance so if there’s low compliance following 4:1 Build blocks they have the data to justify tweaking the code.