i tested your new fix on fresh WP server, not on my site.
on my production site i use old 1.4.0 plugin. to conect to my 1.1 bbb server.
with more then 300 recordings in the list, do not have any problem on my site.
it is working fine now except the delete toolbar button in the recording list is not deleting the recording.
i use test-install.blindsidenetworks.com server to test.
maybe its a permition issue