I think there might be something wrong in the way the new versions check works. The story...
In installed version 3.2x of the Grid format in a new Moodle 3.3 install "in case it worked" before there was a 3.3 version of grid.
Now the updates check in the Moodle plugins page seems to have ignored the new 3.3 version of the plugin.
Anybody know how this works? Sounds like a bug of some description to me. It can't be uncommon to install an older version if there is no choice as they often work fine. But you want to know about it when the "correct" version is released.