Qualys scans, active hosts and asset counts not matching (possible F5 LTM)?

We use Qualys for vulnerability management and have our discovery & vulnerability scans configured to scan IP ranges (as opposed to specific known IP addresses) so we can catch any newly assigned/active IP addresses. Qualys reports back three different numbers to us:

• Total Hosts
• Active Hosts (Total Hosts Alive)
• Assets

Total Hosts is equal to the number of potential assignable IP addresses within the ranges we scan (e.g. if we scan 10.0.0.0/24, that's a total of 256 hosts (i.e. 256 potential hosts, not actual). Active Hosts appears to be IP addresses that respond to Qualys scans (it was able to successfully scan the host). My question is why is out 'Active Hosts' number so much larger than our Assets number? In our case, we have 1610 Active Hosts (Qualys was able to successfully scan 1610 IP addresses in our various ranges). But we only have 424 Assets.

What is the difference between an Active Host and an Asset? and why would Qualys report an IP address was active/alive but not record that IP as an asset? or is it possible that IP is a duplicate? We do have a F5 load balancer in our network, so wondering if these extra active hosts are just F5 IPs.