Read my blog navagrahastro.blogspot.in where I have given a method of evaluating a horoscope. You do not have to worry about upapadalagna and its implications. Also you can visit jyotishvishesh.blogspot.com if you are so particular to know details about it.
Upapada Lagana is a concept of Jamini astrology. I’m not sure anyone on this website is familiar with Jamini astrology. You should read some books by K. N. Rao and you will get a whole lot of information on this. As per my knowledge he has done enormous work on Jamini.