Magento losing catalog price discounts

[saulkarl]

I run 4 stores with the following timezones:
Store A: GMT -7 hours
Store B: GMT 0 hours
Store C: GMT +8 hours
Store D: GMT +4 hours

Product price reindex starts at 2:00am and 9:00am (GMT +8 hours). Recently some customers are complaining that they do not see the discounts at approx 5:00am (GMT +8 hours) in Store C or Store D.

When should the price reindex start to ensure all the discounts are effective across all the available timezones?

[Brent W Peterson]

How many SKU's do you have? Can you simply do an index on save?

[thevino1]

I am having a similar problem....I have a 40% discount applied (Catalog Rule) to certain items, but every two days the discount drops out and doesn't apply to the shopping cart.  The items still show the discount price but customers are being charged full price on check out.  Why would this be happening?  My dates are set to run through January 4th..