|>> my dads like if we put the downloader on the other router his downloading wwont affect us as much cause were on the other router thats the reason for the switch and 2 routers.. <<|
That is incorrect thinking. The only time that is going to do anything is of you have two completely separate Internet connections. With two routers on the same Internet connection they are both going to be sharing the same bandwidth so one or two isn't going to make any difference.
>> otherwise i wud just get a router with more ports instead of 2 routers..<<
Thays what the switch is for. A a four port router is is a router with a four port switch built in.
Get the topology right first. Confirm that the wiring is as previously described then it might be possible to do some logical troubleshooting.