Well, that's easy to explain:
Both modes 2501 and 12000 designed are for analysts who work on large hashfiles.
You captured a network with the same ESSID.
Time for calculation of the PMK list : 0.00 (you have the list allready)
Time for hashcat: real10m54.866s
You captured another network with the same ESSID
Time for calculation of the PMK list : 0.00 (you have the list allready)
Time for hashcat: real 10m54.866s
Both modes 2501 and 12000 designed are for analysts who work on large hashfiles.
You captured a network with the same ESSID.
Time for calculation of the PMK list : 0.00 (you have the list allready)
Time for hashcat: real10m54.866s
You captured another network with the same ESSID
Time for calculation of the PMK list : 0.00 (you have the list allready)
Time for hashcat: real 10m54.866s