for the purposes of this post
E= even con
#U is # of up arrows
#D is # of down arrows

here goes the an Oakmyst spider(1950014) has a level range of 7-8 ( so as we know it will have a chance of either 7 or 8

the spawn groups i am working with require the following 2 spawns
spawn1 --- E
spawn2 --- 3D
both at the same level either 7 or 8
in order to achieve this will i need separte spawn id (1950014 level 7 and 1950125 level 8 ) for even con spawn
and then (1950124 level 7 3d and 1950126 level 8 3d)
and then 2 spawn groups
with
group 1 being 1950014 and 1950125
group 2 being 1950125 and 1950126

then associate group1 with group 2

all this so that when a group spawns they will all we the same level other wise if a spawn is a range of 7-8, then a group could contain both a level 7 or 8( mixed level

A spawn can have a min and max level range so when it spawns into the world it can be within that range. So you should only need one spawn for the even cons.

For the ones with down arrows it would need to be a separate spawn like you assume but again you could apply the level range so you would only need 1 new spawn instead of 2.