How can they oversell like this?

I have details of the number of spaces and permits in Zone 8. I've written them out in a table below which clearly shows the massive scale of the problem.
Here they are:

Street	Residents' Spaces	Residents' Permits Sold
Admiral Terrace	9	12
Alvanley Terrace	0	5
Argyle Park Terrace	10	13
Argyle Place	13	16
Barclay Place	0	8
Barclay Terrace	0	6
Brandfield Street	2	1
Bruntsfield Crescent	12	24
Bruntsfield Place	0	33
Bruntsfield Terrace	5	7
Gillespie Crescent	55	79
Gillespie Street	0	3
Gilmore Place	0	40
Hailes Street	10	10
Hartington Gardens	0	1
Leamington Place	0	2
Leamington Road	3	11
Leamington Terrace	62	90
Lochrin Buildings	0	18
Marchmont Crescent	47	48
Marchmont Road	21	48
Marchmont Street	37	49
Meadow Place	14	21
Richmond Terrace (Mews529)	0	21
Roseneath Place	7	37
Roseneath Street	0	23
Roseneath Terrace	9	30
Spottiswoode Street	37	32
St Peter's Place	0	13
Upper Gilmore Place	28	30
Upper Gilmore Terrace	0	1
Upper Grove Place	22	37
Viewforth	43	65
Viewforth Gardens	16	16
Viewforth Square	12	33
Warrender Park Crescent	32	43
Warrender Park Road	112	171
Warrender Park Terrace	82	105
Westhall Gardens	20	22
Whitehouse Loan	18	1
Total	738	1225