The discount system on Simply Owners runs on a Tier system. The discounts that are applied first come from tier 1, then tier 2, and so on.
In addition, any Rule-Set nightly price adjustment will happen BEFORE any discount.
The tier order is as follows:
As you can see, the Early Bird Discount and Last Minute Discount are in the same tier, this means that only the highest of the two will be applied (for that tier).
£1000 - 10% = £900 (Length Of Stay Discount)
£900 - 10% = £810 (Last Minute Discount)