vRealize operations missing objects

Hi There,

I stood up a vR ops 6.0 and added my production vCenter as a target. It has run for over 1 month.  I just discovered I only have 886 objects.  If I look at my vC ops 5.8 I have around 6800.  So why is this objects number so munch lower in Vr ops 6.0.  When I drill down to the vm level in 6.0 lots of vm's have no metrics or data

vCops 5.7.1

vRops 6.0

VSphere & esxi 5.5U2

Any ideas

Dom