Because there are several ways to interpret the charm —I know you see it differently 
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The 8 is a Voynich symbol, so it’s actually pointless to speculate about it. It could be a d or a t, but it could also be a simplified form of the German “ß” (sz), which would mean the 8 could also represent tz, ts, or s—precisely because of the lack of spelling conventions at the time; people wrote as they spoke. In dialect, “s” quickly becomes “sz” (two sibilants)
We won’t be able to clarify “Oladaba8” for sure
“porta8” as “portat” or “portas” (or something else)—also uncertain
“valden” = “falten” (to fold)—conceivable. As “valzen” = “walzen” (to roll), also conceivable. But also uncertain.
But the third word could simply be “multos” if the last glyph—the 8—can represent an “s.” Otherwise, I can’t think of any other possibility.
In short: We don’t know what the 8 is, but as “s/sz” it has the most possibilities—that’s a good argument in its favor—
but certain not a proof... in no way.
.The 8 is a Voynich symbol, so it’s actually pointless to speculate about it. It could be a d or a t, but it could also be a simplified form of the German “ß” (sz), which would mean the 8 could also represent tz, ts, or s—precisely because of the lack of spelling conventions at the time; people wrote as they spoke. In dialect, “s” quickly becomes “sz” (two sibilants)
We won’t be able to clarify “Oladaba8” for sure
“porta8” as “portat” or “portas” (or something else)—also uncertain
“valden” = “falten” (to fold)—conceivable. As “valzen” = “walzen” (to roll), also conceivable. But also uncertain.
But the third word could simply be “multos” if the last glyph—the 8—can represent an “s.” Otherwise, I can’t think of any other possibility.
In short: We don’t know what the 8 is, but as “s/sz” it has the most possibilities—that’s a good argument in its favor—
but certain not a proof... in no way.