Reward Points Module for ZC v13x

[zekin]

I have been using this mod for almost a year, so far so good, except a glitch I have noticed:

btw: I am still on 1.3.9h and reward point v1.40a (downloaded at omnicia.com)

I use sunrise period (eg 30 days) to make all pending points to earned.
Problem is, sometimes (not all the time), in customer > Reward Points , occasionally when I check WHY some customers still have pending points even their orders were much older than the sunrise period - I am seeing orders that made 2 months ago, its reward points are still pending.

Then I checked their "Pending Reward Points" table, the date is no longer the order's date. I am not sure what trigger to change that date, but, it seems, that pending points is stuck there because the date was somehow changed and that date is now within the sunrise period.

My question:
1. what to trigger the sunrise check? is it when admin login at backend? or when customer login at frontend? or when any page at the store is loaded?
2. what trigger the change of the date in "Pending Reward Points" table of each customer?

Thanks.