Yup, Ganesh is asked to bless the occasion, just like Sikhs do an Akhand Paath, although its not necessary in my personal opinion, as just love for Vaheguru should be sufficient enough. But we are humans and we all have our failings, doubts. In Snatan Dharam (Hinduism), there is a lot of "personalisation" of God, you can see this in the humanisation of the the murtis of what they think/believe God to be.
Asking for blessing is a good thing and should be done, as for the ceremonies, its good too, as it gets the family together.
To be honest, I wouldn't look too much into it. I am not surprised at these so called "sakhis". Honestly, I don't believe it, remember this is my personal opinion and belief, I am not a socalled book scholar, just a practical & realistic guy.
Yes and No, its like tracing the roots of Folk Songs. I believe some of these rituals are more cultural, i.e. tribal.
I agree, its not really worth looking into, however knowledge which educates and clears and misconceptions is always good.
I find it to be the opposite. I find the Hindus get into a huffy puffy about the Sikhs, especially when they say they are not part of the so called "Hindu brotherhood". From my experience, its always the Hindus (and muslims) who can't handle that the Sikhs are an independant nation. They always use the "yeah but guru nanak was born into a hindu family"...this is when the party starts.
here is a link, there is plenty of info on-line, have you tried using google/bing????
http://en.wikipedia....ding_traditions