Mediabase Quick cut question

[uplink2]

I've been wondering for a while now about why the spin totals on a Mediabase Quick cut link don't add up to the total spins many times? Say a song has 500 Pop, 300 HAC and 100 AC spins. The weekly total should be 900 but many times the Total to date is then 927 or something. Where are those unreported spins from? Small market reporting but non-monitored stations? Stations with no clear format? College stations?

Here is an example, Elliott Yamin's new song shows 5 spins on the weekly total so far but the total to date is 6?

www.mmr247.com/mmrweb/Reports/Reg/EMD.asp?SOngID=1637878&NumDays=7

Just curious where they come from,

[Au$tin]

Very, very small unmonitored stations. Quick Cut itself shows stations the actual chart doesn't have, but still neglect to show extremely small ones in the weekly total.

I notice too they also neglect to show Radio Disney's spins in the weekly total, but it's in the overall total.