Is it OK if I use 2 different computers to log on?

- You'll be fine. I use two computer and my phone. That's totally normal in this day and age, and the admins understand that. :)

If you really feel worried though you can always file a ticket and just let staff know so they can keep it on file. :D

Yes, I use my PC in general, but when I'm out for more than 12 hours, I'm taking my laptop and login from there.. and I'm doing BQ on my phone everyday because it's much much quicker to finish it..

You're safe as long as no one else logs in from either of those computers, if someone else does, you should file a ticket. if no one else does, you should be good.