Connect multiple source pins together to power signal in Eaglesoft
To answering question 1 :
The problem was on the library. In the symbol there was 7 different pins which was not connected to each other, so the problem was solved by removing them and placing 1 source pin instead of 7 and appending the pins all together in device page.
For question 2 :
Simply right-click on polygons and select properties, then uncheck the thermal and OK, all the pins will be merging with polygons.