Yes, this is normal and actually still better than what Tap sometimes does. Screw them. They ignore the law, don't rebook you on the next alternative, don't offer any compensation or customer service.

The best is that their CEO could not care less. She is just in Brazil celebrating one additional weekly flight to OPO while the airline gets worse and worse.
The already poor Portuguese tax payer pumped billions into this crap airline, each inhabitant actually paid an equivilant of a business class flight just to keep them alive. No wonder that David Neeleman ran away as fast as he could.

Meanwhile Portuguese politicians of the same party and government fight over the next location of LIS airport. This airline and country is just a joke.