Formulas change when column/row is deleted... how can i stop that?

Ok, so I have a spreadsheet that holds the NHL schedule for the season. (See thumbnail)

In the picture I've highlighted the formula I use to determine how many games each team has over the next 7, 14, 21 and 28 days. What I've been doing is deleting the column for each day after that day has passed. (So tomorrow, I'll delete column K, and all the other days will move up one. Sunday will become column K)

My problem is that the formula =7-COUNTIF($K3:$Q3,"—") in cell G3 will read =7-COUNTIF($K3:$P3,"—") after I have deleted Saturday, and thus will only count 6 days worth. (The 14, 21 and 28 columns will only count 13, 20 and 27 as well.) Is there any way I can write this formula so that it stays as K3:Q3? Right now each day I modify the 4 formulas for the 1st team and then copy/paste then over the other 30, but this is rather tedious.

Thanks for any help!
RNiner