1st test
Day 1 session 1, Australia 109/1 = Australia
session 2, Australia 108/2 = split
session 3, Australia 129/0 = Australia
Day 2 session 1, Australia 81/1 = split
session 2, Australia 101/4 = England
session 3, Australia 74/1, England 53/3 = Australia
Day 3 session 1, England 65/2 = Australia
session 2, England 39/5, Australia 33/0 = Australia
session 3, Australia 148/1 = Australia
Day 4, session 1, Australia 21/0, England 43/2 = Australia
session 2, England 107/1 = England
session 3, England 143/2 = England
Day 5, session 1, England 77/5 = Australia
1st test, 8 sessions Australia, 3 sessions England, 2 sessions split, 2 sessions not played
2nd test
Day 1 session 1, England 58/2 = Australia
session 2, England 86/0 = England
session 3, England 122/1 = England
Day 2 session 1, England 81/0 = England
session 2, England 121/1 = England
session 3, England 83/2, Australia 28/1 = England
Day 3 session 1, Australia 77/2 = split
session 2, Australia 80/0 = Australia
session 3, Australia 127/2 = Australia
Day 4 session 1, Australia 105/1 = Australia
session 2, Australia 85/1 = Australia
session 3, Australia 11/3, England 59/1 = England
Day 5, session 1, England 30/4 = Australia
session 2, England 40/5 = Australia
session 3, Australia 168/4 = Australia
2nd test, 8 sessions Australia, 6 sessions England, 1 session split
3rd test
Day 1 session 1, Australia 69/3 = England
session 2, Australia 115/3 = split
session 3, Australia 31/4, England 51/2 = split
Day 2 session 1, England 71/4 = Australia
session 2, England 87/4 = Australia
session 3, Australia 119/1 = Australia
Day 3 session 1, Australia 101/2 = split
session 2, Australia 137/1 = Australia
session 3, Australia 170/1, England 19/1 = Australia
Day 4 session 1, England 80/0 = England
session 2, England 81/1 = England
session 3, England 85/3 = Australia
Day 5 session 1, England 84/4 = Australia
session 2, England 1/1 = Australia
3rd test, 8 sessions Australia, 3 sessions England, 3 sessions split, 1 session not played
4th test
Day 1 session 1, England 36/1 = split
session 2, England 81/3 = Australia
session 3, England 42/6, Australia 48/2 = Australia
Day 2 session 1, Australia 53/3 = England
session 2, Australia 115/0 = Australia
session 3, Australia 146/2 = Australia
Day 3 session 1, Australia 47/3, England 28/0 = England
session 2, England 62/4 = Australia
session 3, England 71/6 = Australia
4th test, 6 sessions Australia, 2 sessions England, 1 session split, 3 sessions not played
5th test
Day 1 session 1, England 58/1 = England
session 2, England 91/1 = England
session 3, England 85/2 = split
Day 2 session 1, England 57/6, Australia 4/0 = Australia
session 2, Australia 105/2 = split
session 3, Australia 79/2 = split
Day 3 session 1, Australia 137/3 = split
session 2, Australia 68/3, England 43/1 = England
session 3, England 71/4 = Australia
Day 4 session 1, England 33/5, Australia 46/0 = Australia
5th test, 3 sessions Australia, 3 sessions England, 4 sessions split, 5 sessions not played
all 5 tests, 33 sessions Australia, 17 sessions England, 11 sessions split, 11 sessions not played
Doesn't seem to me that England lost the ashes on just a few sessions.