Now things are getting complicated, since the site we are using for tracking it has random draw, matches order isn't the one we posted before Round 1.
I don't know what website you are using for generatng the fixtures and how it exactly works. So, I don't know if my suggestion will work.
Use numbers 1 to 18 instead of team names and asssume that the draw result is as follows.
06 vs 09
04 vs 18
03 vs 05
13 vs 07
14 vs 08
15 vs 12
01 vs 16
02 vs 10
17 vs 11
Now you should replace the above numbers with team names.
Replace 06 with jayce and 09 with Trofo.
Replace 04 with leea-1334 and 18 with notblox1.
And so on.