maxnummp has changed after node is exported to another server

I have two TSM servers, one is version 5.5, another is 6.3. Our plan is to export all nodes from 5.5 to 6.3. Server 6.3 is defined in server 5.5, so one can do exports from one server to another. However, after running following command

on old server, I see some changes in node's configuration on new server. Maximum number of mount points on new server is set to 1, although it was bigger than 1 on old server. Any thoughts what's wrong here? Bug, feature, something else? Beside this parameter everything else is exported correctly.