My doubt arises from this article https://lrc.la.utexas.edu/books/rigveda/RV00
Also the Tāittirīya-saṁhitā́ contains both mántra-s (poëtry written in meter) and yájus-es and brā́hmaṇa-s (prose not written in a meter): the latter doesn't need metrical restoration, while the former does. As an example, we have the following mántra (in the tri-ṣṭúbh) from TS 184.108.40.206–2:
Şúciṁ nú stómaṁ • náva-jātam adyá
Índrā-Agnī • vr̥tra-haṇā juṣéthām.
Ubhā́ hí Vāṁ • su-hávā jóhavīmi
tā́ vā́jaṁ sadyá • uşaté dháyiṣṭhā.
But the Tāittirīya-saṁhitā́ has instead ady' Éndr'-Āgnī (missing two syllables) and dhéṣṭhā (missing a syllable).
If this is true, then what are the implications of this? Does this mean all the mantras chanted in the past 2 millennia were chanted with errors?
I'm not stating that we are reciting the mantras wrong, I am wondering if we are reciting them wrong