First you said it was a fact:
Yes, St. Bede and everyone else I have mentioned teaching spherical earth were communicating truth/fact....They were not proposing theories.
Then you backtrack and say there was "consistent agreement"
in the case of De Sphaera, there was consistent agreement with the idea of spherical earth.
1. Consistent agreement means there's still disagreement. It means it's not a fact. Unless you don't know what "fact" means?
2. Then you say there was agreement with the "idea". Does this mean (as I showed earlier) that people agreed with the conclusion (i.e. sphere earth) but did not agree on the system details? Seems that's what you're now saying.
3. Agreement with a conclusion does not mean there was a consistent, factual agreement on how it worked. Ergo, not a teaching.
Also, the fact that this book was used for centuries, is a pretty good indication of the respect in which it was held.
Now you further water down your original statement by saying the book's use was a "good indication" of its acceptance.
1. There weren't many books around prior to the printing press in 1430s. The Middle Ages didn't have many options

2. It's use in debate doesn't mean people believed it was true. Debate was part of learning. A book was a starting point for theories and proofs.
Keep trying...