Is this the only table that this happens on? Or is this the only table that you are replicating from both clients? I assume you've tried stopping and starting the table to see if it will recreate the trigger.
Another option is to set the configuration to be Multiple Client, so you pull across all of the clients into the target. You could add an include program or rule to exclude certain Clients on various tables if you wanted 1 table to only load a certain client. It's not as ideal as a filter being on the trigger.
I'm not certain if this setting would have to be checked when you created the configuration or not. But if it worked, you'd only need 1 trigger per table.