As indicated in the comment here (thanks to Paul for the detailed information), there is a cache issue in Grid Archives 1.6.0 and above.
Version 1.7.0 addresses this issue so now you can have multiple instances/pages of grid archives running and showing different categories at the same time.
No screenshots available in this update since it’s just a cache fix, but I may add an option to enable/disable cache in the future release of Grid Archives. We will definitely have screenshots at that time for sure So, stay tuned~
- fixed the cache issue
- make the plugin compatible with wordpress 3.6