Restricted availability of Merchant Alliance voyages

Since the release of cargo runs you've still been limited to buy 3 voyages from the Merchant Alliance before each restock of contracts. The problem with this is that if someone wants to cycle through or do multiple animal deliveries they're restricted to only 1 or 2 per stock of contracts; the same applying to cargo runs. Why not just have 2 pages of Merchant Alliance voyages with 3 of each variation on each page?