I didn’t expect to come across another bug after all this time, but…
(Before the Big Important Thing, no real spoilers)
If you only have one formula in your bundle of papers (perhaps because you reset and then picked up only one paper in the new runthrough), the description when you examine it is a bit odd.
These are all the bits of paper you’ve picked up recently. The bundle contains the Binding of the Celestial Sphere; it also describes. You have more memorized, of course – you don’t need to refer to the paper to use them.