[FSOD] Complication

Hello,

I finally got help from a lot of you on here and I appreciate it so much, my original problem was my client wouldn't let me change the IP for others to connect to my server.

You helped fix that, so thanks to all of you, but now there's a weird problem, i'll explain it as thorough yet brief as possible.
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I'm in a hamachi(that I host) with 3 other friends that we wanted to code on a pserver n test shit together, so one of my friends is able to connect to my server with me, yet the other two cannot, even with the same client as us, on my old source 2 of the 3 could connect, but now he can't even connect, only one of them can.
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Solutions i've tried:

• Made both of them start and stop the hamachi service(services.msc) and restart it, didn't work.
• Made them turn off both their firewalls (public and private), made them try it with private on, and private off, and private on and public off, still no.
• Made a new client portforwarded my port to 8888, and put my Ipv4(192.x.x.100) and then set the IP to my home address so they could connect, didn't work, tried it with setting the IPv4 to my IPv4, didn't work of course
• I tried to change the .cfg's(w/server.cfg) and it didn't work, I also tried to change the max clients allowed, everything I can do, i've exhausted all options to my extent..

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I honestly do not know what to do to fix this problem, and I don't understand how the same client can give two people connect, but the other two with the same configurations a non-connection(terrible wording lol)