I am pretty sure this is a bug. When you are in the shopping cart and increase the quantity until the MOQ is met for a discount, the total is updated but the price next to the product is not. For example:

Pricelist rule:   Minimum Order Quantity: 5; Discount: 10%

Shopping cart: Camera. Quantity : 4. Price: $100. Total : $400

Action: Increase quantity + 1.

Shopping cart: Camera (quantity 5). Price: $100. Total : $450

If I refresh the browser the Camera Price shows correctly as $90. However, if I decrease the quantity to 4, the total will update to 400 but the Camera price will still say $90 (same issue as described before).