While the Liberal democrats overall gained seats (up from 51 to 62 now), they also lost 5 seats to the Tories. Was this because of “tactical unwind”?

When the Tories announced that they were going to go for hi-tech Machiavellian psephology, some witches brew of rightwing populism and computerised number crunching, an ominous shiver went around the anorakorati, convinced as they tend to be by the example of the Republicans in the US that this is an unstoppable formula.
I wasn’t so sure. [...]