Placeholders Compile as Text

I am new to Scrivener, and am looking to use placeholders to refer to two figures/equations. I have done some searching and reading but can’t find what I’ve done incorrectly. The placeholders are compiled as plain text. I have noticed that when I don’t add an identifier (:identifier), the numbering works as expected. But this won’t allow the use of multiple numbering fields.

I display the Text and Compiled Text below.

Text

Since the effect to angle scales differently with zero-error and wavelength, both of these parameters can be refined simultaneously (Equations <$n:eq:zero> and <$n:eq:wave>). They are not correlated.

Equation <$n:eq:zero>

Equation <$n:eq:wave>

<$n>

Compiled Text

Since the effect to angle scales differently with zero-error and wavelength, both of these parameters can be refined simultaneously (Equations <$n:eq:zero> and <$n:eq:wave>). They are not correlated.

Equation <$n:eq:zero>

Equation <$t:eq:wave>

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