Your criteria to merge orders is bullshit and an example of laziness to work:
Orders can only be merged if they satisfy the following criteria:
Customer name and address must match (Case-sensitivity will not be applied)
The orders must originate from the same channel (Source & SubSource)
All orders must be paid
All orders must have the same currency
All orders must have the same Linnworks Postal Service
All orders are not Locked/Parked
The same people have bought orders with the different shipping methods or in different currencies they couldn't be merged even we can't create a rule to do it. We waste paper, packaging material, a post office has more job and the most important - people receive fragments, not the full order. This is the 21 century.
Yes in Channel Grabber it use to pick orders with the same postcode and suggest a merge which you had to manually agree.
It was really useful