If you create several different offers, sometimes In Cart Upsell may show a different offer than what you expect. To avoid overwhelming your shoppers, we show only one offer at a time. Here's how the system decides which offer to show:
If multiple offers fit a shopper, the system chooses the most specific offer that fits (ie. the one with the most rules that are true)
If there are multiple offers that fit and they have the same number of rules that are true, one of those is chosen at random.
So, if you prefer that a certain offer be given preference, you can add additional triggers- or if you want offers mixed up randomly, try to give them the same number of rules.