Is it normal that I have 3 chia_full_node processes?

[ardabro]

USER         PID %CPU %MEM    VSZ   RSS TTY      STAT START   TIME COMMAND
xxxx        1437  0.0  1.5 216352 59292 pts/1    Sl   09:47   0:10 chia_daemon
xxxx        2220  0.0  1.4 302968 53920 pts/1    Sl   09:48   0:15 chia_harvester
xxxx        2221  0.0  1.5 272324 57848 pts/1    SLl  09:48   0:31 chia_farmer
xxxx        2222 26.3 11.9 987892 456772 pts/1   Sl   09:48 223:11 chia_full_node
xxxx        2223  0.0  1.7 443296 67676 pts/1    SLl  09:48   0:25 chia_wallet
xxxx        3020 35.7  4.8 614780 183944 pts/1   S    11:16 270:53 chia_full_node
xxxx        3023 35.8  4.8 614780 183944 pts/1   S    11:16 271:23 chia_full_node

I also see that the remaining two started later than daemon, harvester, farmer.
How they could start?

[hoffmang9]

This is what python multithreading looks like.