Just to confirm what you wrote. I tried on my other device, a Samsung phone S2 and those problem do not appear. So the problem is related with the Samsung GT 7.7. I will make a test with another tablet, the Samsung 2 7 and I will report about how it works. The good thing is as I use the phone as a backup GPS, I will be able to see the pilot lot if necessary while flying without problem. What is strange is that the GT 7.7 has more memory than the S2...Thanks again for your rapid and clear responses.
Guillermo