Rule to derive positions for Double Octave for the 7 scales.

The numbers on the first row and the second row, which are in BOLD represent the scales

1 - Ionian

2 - Dorian

3 - Phrygian

4 - Lydian

5 - Mixolydian

6 - Aeolian

7 - Locrian

So 5 means - Mixolydian and so you should follow the pattern starting from column 5 by assuming that is the 6th string.

Of course you have to make adjustments when you go to the 2nd string. Go high by a semi tone and follow the pattern, that's all. 

Putting up patterns in a separate post anyway, but it's nice to know this amazing shortcut to remember everything!

5	1	4
1	1	1	7	3	6	2
			1	1	1	1
2	2	2	2	2
					3	3
4	4	4	4	4	4	4