Estimared time difference 1hash vs 200 hash

[electronos]

Hi ,
Is it normal that when i am cracking in -a3 mode with 1 hash i got estimated time=2.5 days for 8 chars , but when i load about 200 hashes i got 3.5 days only for 7 chars ?

If its normal how can i reduce this time ? 
And anyone knows why it should be different?

[penguinkeeper]

If your hash is salted, then 200 hashes will make the attack 200x slower so 1 day for 1 hash turns into 200 days for 200 hashes