I don't believe replication is the issue here however, I could be wrong!
Nevertheless, I would begin by perfroming some QA of the transactions that are in the Distribution Database compared to what actually replicates via your "Wireless Network"!
The transactions could be going missing via your "Wireless Network" somehow but you will have to prove it!
Secondly, is there an application that hits this Database? In other words, what actually Insert/Updates & Deletes data for this Database?