Greetings Chickiemom25,
This is very interesting to me, I do not have guineas, just chickens. But, I have been preparing to get some this June. The pen and house with outdoor perching is ready for them.
I have been reading an excellent book, "Raising Turkeys, Ducks, Geese, Pigeons and Guineas", by Cynthia Haynes.
Apparently they do squawk a lot during their breeding season. Also, when they are alarmed about predators, or feeling insecure. It is best to have a house for them to sleep in, as well as, perches. Guineas prefer to perch at night, being on the ground will make them feel vulnerable to predators.
Unlike other poultry species, they still maintain some of their wild traits. It seems your guineas are trying to get your attention, by seeking you out on the porch and at night. Remember, they originated from a warmer climate, and even though they can endure very cold weather, they still need shelter to maintain body warmth in very cold temperatures, especially if there is wind chill factor. This may be another reason why they are sleeping during the day in the sun.
These are my thoughts on your guinea situation, I hope they are of some use.
Please post any updates, especially if you are able to resolve the issue. I look forward to learning more.
God Bless and peace to you and all your birds!