I have couple of questions about after effect. please help me.

hello

i made about 5000 paint brush to shape a person's movement.

and then i was try to put glow on those brush. 

but i can't see brush number less then 3000 sth. 

seems like can't display more than 2000brushes.

if i keep scroll down, it stops around 3000. (but it's not froze, if i scroll up, i can go up.)

is there any way to see the whole paint brush i made?

and second quesion's simple one. 

the one we can download and install is not for m1 mac isn't it?

if i download "beta" one is that for m1?

please help me~