Regarding your questions about the calendar-almanac:
1. Herapancami is correct (9 July 1970).
2. When there is an important Dvadasi, the Ekadasi fasting is transferred on the Dvadasi, and this is called Mahadvadasi. The 26th October, 1970, is actually Dvadasi, so the fasting is observed together, or Ekadasi fasting is disregarded, and the Dvadasi (Mahadvadasi) fasting is taken as important.
You were give this old Panjika just to consult the names and spelling only. The dates are different, so whatever date I have given, that is correct. Why you are searching Byanjali Dvadasi in this last year's Panjika? What I have given is from this year's Panjika, so everything will not collaborate.
3. The word is __. That is called Odana-Sasthi and the date is 14th December, 1970. That is correct even if you do not find it in the dictionary. The dictionary may not have every word.
5. 7th February, 1971—Varaha-Dvadasi, I have explained the position in regard to #2.
6. So far determining Ekadasi it is counted 11 days after the full moon and 11 days after the new moon, but sometimes it so happens as you have noted one day later. However, what I have given is correct.
The Panjika which I gave you is old Panjika, our calendar is for this new year.