Passing arguments to a node with an alias url
Iv'e not tested with more than 8 args, but I enabled path_alias_xt when passing args to a node Alias with /mynode/term-name/tid and the 404s magically went away.

https://www.drupal.org/project/path_alias_xt

Further more using
print_r(arg(2));
in the node template prints "term-name"