I've read that Rahu and Ketu are normally only conjunct after D-10, with the exception of D-2. In my own horoscope I have Rahu and Ketu conjunct in D-5, D-6, and D-8.

Is this strange? Is this significant? There is very little information about this conjunction.
After D-10, how common in the Rahu and Ketu conjunction? I have this in D: 16, 20, 24, 30, 40, and 45. It stops before Shastiamsha.

Bheri and Kalpadruma occur on many divisional charts.
Are yogas significant on divisional charts?

Many Thanks!