It’s clear: You do not know how the export certificate work.
Stop making supposition and writing bullshits.
If you do not know how RouterOS works, you can only write thousand of nonsense.
If you do not export WITH PASSWORD you do not export the private key.
Instead to do random complain, study how RouterOS works.
From the post… #2!!!
Did you import the private key that goes with certificate as well?
Based on this (full export of every aspect):
http://forum.mikrotik.com/t/router-crashes-are-wiping-the-config/149189/7
:local certpass "myprivatepass"
/certificate
:foreach cert in=[find] do={
:local certname [get $cert name]
export-certificate $cert file-name=("auto_$certname") type=pkcs12 export-passphrase=$certpass
}