Hi Mark, we have 2 orders for you,The first contains 2 packs of Senia, and 4 rolls of All-in-One underlay - going by this you have over ordered the underlay, as this QTY covers 40m2, whereas your flooring covers only 4.498m2. As this is an automated system, it can only calculate based on the value entered - so when inputting a value into the Senia (i.e 4m2), the system divides this value by 2.249 (the pack size), the system would work this out as 1.78 and then round this up to 2 packs required.Our friendly team are always on hand to help with any enquirers in regards to measurements, or if you simply wish to double check qty's before purchase.Regardless of this issue, we hope you are happy with both of your orders and are enjoying your new flooring's.