Too many collisions with -m 9720

Hi,

Using latest cudahashcat, I try to collide some old Office hashes.
Using -m 9710 is okay.
Then I use -m 9720 with the results given by -m 9710.
My issue is that this last cmd give me lot's of collisions, let's say 5 in one hour. Cool, but what if I only want one collision ? Or two ? Can I specify this ?

Thank you.