TOPIC: Nova Sunshot Pellet Clarification

As I read tokendb now, if you hit with a Nova Sunshot Pellet, you do 5 force damage to every opponent in the room. The original creature targeted would take full normal ranged damage for the hit.
Question One:
If a rogue using a bead of guided strike and lenses of Agility hits an opponent for a critical hit using a sunshot pistol, is this a correct description of damage dealt?
Opponent takes: Sneak attack damage (15 or 20)+((weapon dmg + ranged damage +5)*2))
(Example: 20 sneak plus ((6 weapon damage + 38 ranged dmg +5 force from Nova pellet)*2) [94] for a total of 114.)
All other monsters in the room take 5 force damage.

or would it be
Sneak attack damage (20)+((weapon dmg[6] + ranged damage[38])*2)+5 force for a total of 109
All other monsters in the room take 5 force damage.

Second question - if Oil of Sacred Sinew were applied to the pistol firing the Nova Sunshot Pellet, would it just do +3 damage to the single primary target (I suspect that is correct) or would it impact all opponents for an additional +3 damage (I doubt that is correct as the oil must be applied to a weapon, not to ammunition and the "all monsters" is a characteristic of the ammunition.)

Thanks!

Fred

Caveat: I'm writing this on the morning of the first day back after the holiday break. I'm groggy and not yet re-accustomed to getting up this early. I reserve the right to alter this response if it's pointed out I've overlooked an important detail.

Per the PHB:
Other than sneak attack damage (see note below), any and all forms of additional damage are doubled on a natural 20.

The only time sneak attack damage is doubled is when the rogue attacks with a Nightshade weapon or one of the Viper Strike fangs in conjunction with the Viper Strike set bonus.

Therefore, if you crit with a ranged sneak attack with a Sunshot weapon firing a Nova Sunshot Pellet, all the non-sneak attack damage--including the +5 Force from the Nova Sunshot Pellet--is doubled on the primary target. Non-primary targets take 5 Force damage, period, end of story. Nothing increases the non-primary damage from a Nova Sunshot Pellet. (That ought to answer your second question.)