Budget Airlines - not as cheap as we think

Having decided to go back to the UK for a long weekend in September, after the kids have gone back to school, I decided to scan the budget airline sites to see if there were any bargains. I want to fly into East Midlands, as I will be staying with my dad in Nottingham and his house is only half an hour from the airport. Easyjet and BMI Baby fly into East Mids, but BMI usually have better flight times and slightly more expensive prices. I found an outward flight on at 2pm for €58 from Malaga to East Midlands and a return journey, the following Monday at 10am, for €40. Hmm not bad I thought. I thought wrong. I had calculated that this would probably work out at a total of approx. €150 when taxes and whatever other surcharges were added. Wrong again. After the airline had added €31 - yes €31 - for checking in at the airport with one bag, plus taxes, the total amount came to €194.00. Then to top it off, I was charged €8 for having the audacity to pay by mastercard. So the total came to €202 for flights that were advertised at €98. Not quite cricket is it?? These airlines encourage us to book online, then charge us €8 for the pleasure plus an additional charge for checking in ONE bag. If I had taken their travel insurance too, plus asked for a designated seat number, I would have had to take out a second mortgage. Why oh why can´t the advertise the prices to include something other than parking your bum on the aircraft seat, then we might not feel quite so misled when we see the total price.