Yep maybe you're right as several people mention it, in the comment below.
- To answer you, when you drag the dice and it come back it could mean that your module isn't activated or that you don't have the corresponding dice to activate this rule.
- The multiple icon for the dice are related to its value :for example, 4 ⚡ on the dice mean 4 energy, and so rules which allow you to rebuild based on the dice value will rebuild more with an higher value (it's a the same as a normal dice instead here it's ⚡ value).
- Once you finish a day, it's like going to sleep for the robot so you regain all the dice you used during the previous day except that their values may change.