How are IT Assets calculated?

How are IT Assets calculated?

 How are Assets tracked by the asset cap for your SD+ purchases.  Currently we are allowed to have 250 assets max.  We are receiving errors saying we can't add any more assets because we are at our limit, however, under assets view it says we have a total of 252 assets:

IT Assets
Workstations 80
Printers 3
Routers 2
Servers 70
Others 97

How then, are the 250 assets calculated?  Is it just the first 250 names that are listed under "IT Assets?"

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