You should not have 2 Migration Bridges. In your PCF, the last device you should have is a "Migration Bridge". If you have 2 migration bridges, then this means that you most likely put a Migration Bridge device in your input CCF. In the Input CCF, the device should be named Migration Hooks and contain actual IR codes for all jukeboxes, cableboxes, etc... After SNL is executed, this CCF (or PCF after import) should be able to control your equipment standalone to select discs, assuming that the system is powered on.

This Migration Bridge device (that you add to your existing PCF) contains pages to allow you to have a buttons to which you can link to from your other devices that serves exactly one of two purposes.

Purpose #1 - Button serves as a link target and upon completion of migration, action list of this button will contain a link to a corresponding button in the Migration Hooks Device (merged from output CCF that has been imported into NG editor) such that you can Jump to the SNL List.

Purpose #2 - Button contains a Jump to the transport page of the Jukebox Device (or Cable Device) and, upon completion of migration, will be the target of a link. There is a corresponding button in the Migration Hooks Device that will link to this. Note that SNL should have been setup to use the button in the Hooks CCF named PlayerJump as the button executed at the end of a disc selection when you want to follow disc selection with a jump to the transport page.

So, following merge of the 2 PCF configs (your original and the SNL Output CCF that you imported and saved as an PCF file), you will have a Migration Bridge Device, an Extra Home Device (that may safely be deleted), and a Migration Hooks Device (followed by all your devices representing SNL lists).

Once the configs are merged, you have to drag links from buttons in Migration Hooks into Migration Bridge buttons (Purpose #1 above). This allows you to jump from your existing original config to an SNL List. Then, following the first set of drags, you will need to drag links from buttons in Migration Bridge into Migration Hooks buttons (Purpose #2 above). This second set of links allows you to jump to your Transport Page following selection of a disc in SNL.