You are referring to this
MainWindow::saveClouds() method. When there is only one cloud, it is saved to a single file, this is used when all clouds were merged together before saving the cloud. In the Export dialog, you must uncheck "Assemble clouds to a single cloud" to save all clouds separately.
To save the timestamps, the code may need to be changed. However, depending the precision you need, the IDs can be used. The clouds are saved with their respective ID. The IDs are incremented each time a new cloud is added to the map, so accordingly to Detection rate. For example, for a detection rate of 1 Hz, the time between two IDs is ~1 sec. For 2 Hz, the time between two IDs would be ~500 ms. I'll still check if I can add an option to save the timestamp in the file name too.
Cheers