Zodiac
The astrological zodiac organises ecliptic longitude into twelve signs. The sky’s constellation band and this symbolic division do not have identical boundaries.
How it is defined
The tropical system uses the equinox; sidereal systems use stellar references and an adjustment called ayanamsa. State which system you use before comparing positions.
How to read it
Symbols work in combination: a sign modifies a function and belongs to an element and modality. That combination provides more context than an isolated label.
A concrete example
Charts with different signs may use different frameworks for the same birth. Check the system, time and data first, rather than assuming an error.
Explore further
Compare Sun, Moon and ascendant within one chart. Identify which factor you are reading before applying a general description to your own situation.