Hayanaratna · by Balabhadra
Chapter 7 · Finding the Dashas
दशानयनाधिकाराध्यायः
अत एव सर्वग्रहभुक्तांशानेवं संस्थाप्येति पद्यद्वयेन समरसिंहेन भोग्यभागेभ्य एव दशानयनं स्वीयमतांतरेणाभ्यधायि न भोग्यराशिभ्य इति ॥ अमुमेवाभिप्रायं मनस्यभिधाय समरसिंहाभिप्रायज्ञैस्तेजस्सिंहवामनादिभिः साक्षादंशादिग्रहणमेवाकारि ॥
That is why Samarasimha, in his own other view, gave the dasha (planet period) from the degrees still to run. He did so in the two verses that begin 'set out the degrees gone of all the planets'. He did not give it from the signs still to run. With this very meaning in mind, those who knew Samarasimha's intent took the degrees directly. These are Tejahsimha, Vamana and others.
Simple meaning: Samarasimha counted only degrees, not signs. Tejahsimha, Vamana and others followed him.