yes adding set chassis aggregated-devices ethernet device-count X in my case 22 showed ae21 and all even missing ae5 now I see all ae0 to ae21, I have to addmit I was sceptic before we upgraded from Cisco to Junioper but now I see this is great product with more options than Cisco.
Of course the Juniper forums is great as well, so quick resposne. Thank You again !!!!!!!!!!!!