SONG MODE AND SEQUENCES AND TRACKS

So i made a song with 11 sequences. I thought u could use separate sequences like at first i put my drum patterns from sequence 1-7 and the samples on sequence 10-15. But on song mode i cant play the drums and sample the same time because i dont know how to put 2 sequence the same time. I know how to use the 2nd sequence button which i use to record new beat patterns or sample patterns. I dont understand. Ive tried reading the manual to grasp it but i'm an idiot and still dont understand. Like imi i suppose to to record everything in one sequence
and use TRACKS as individuals instead of sequences.

perfect thats what i assumed. another thing i dont understnad in the manual i know this must be the stupidest thing you guys ever heard but i dont understand drum programs i read it in the manual and it still confuses me so i know i'm pretty stupid. But say if i want to divide my samples from my drums. Why is there different drum numbers when u press shift+programs there is drum1 drum2 drum3 and drum4 and 4banks for the 16 pads with different programs. could i put samples in drum 1 and drums on drum 2 or will it not work during sequence? or do i divide them by programs banks? so confusing. but i know that theres bank a-d to apply 64 pads. But is drum 1 drum 2 drum 3 drum 4 another bigger set of drum arrangements? or is drum 1 bank a drum 2 bank b. so on.. help me understand it please.