Unit conversion to cgs and particle deposition issue

Hi, I am apparently a new user of CFDEM. I have two issues:

#1
I wanted to insert a large number of particles 100000, with radius 0.0005 in cgs unit system and wanted to insert few at some interval. Therefore, I used the following in my init script
fix ins all insert/pack seed 32452843 distributiontemplate pdd1 vel constant 0. 0. -3. insert_every 10000 overlapcheck yes all_in yes particles_in_region 100000 region bc

but I saw that all the particles are being inserted at the same time. I followed the piso Scalar packed bed Temp case as my reference. What am I missing here?

#2
I want to use cgs unit and trying to simulate fluidization. My SI case runs well. I wanted to check if my cgs case runs as well. So I converted all my values to cgs accordingly: (Young's modulus 5e6 to 50e6---this should be the case, right?)...0.0005m to 0.05cm. I changed velocity script as well from m to cm. Then I appended my controldict with the CGS constant as per the ErgunMPI_cgs tutorial. But my fluidization now occurs at the beginning. For my cae fluidization was supposed to occur at 2 m/s but it happens below 50 cm/s (as per my input script U(I am guessing if I input U value 50 at a time step that is in 50 cm/s)) now. I don't know why they are different. They should be the same as I have just converted the unit only.