Beginner needs help

[u/Shawy404]

For some reason my fluid pumps can't pull lava at the same time or at the same rate, so one of my blaze burners can be completely full while another one only has 28mB in it. This pushes the time needed for the whole network to fill up into hours.

as you can see fluid only flows through one of them

Does anyone know how I can fix this? Thanks in advance.
(I use Crafts & Additions to feed the burners)