Yes,
i have somtimes the same.
I would use less cpus
I think 30 cpus work exactly the same hashrate like 48 cpu

Greeting Pellkopf
Yes, I spotted that total hashrate with 30 about cpus is almost same.
Can I use remaining 18 for minning different coin? I f so what option to miner I should add?
just make a new .bat (solo any coin or any pool) and click to open a new instance or any miner that you want to use