can we use two dish antennas instead of one monoblock LNB on a single one?

i have 3 - 4 Dishes and LNBs of similar configuration.

recently my service provider started using bandwiths from two satellites and has distributed the main channels equally in both of them so that we but monoblock LNB from it.

but can i instead use two dishes (which i have already installed and aligned) and just join the two wires by a simple joint?

and since the two satellite are different can i prevent interference since they have different frequencies also?

any technical details explained will be helpful.

please provide information about any other options i have that i can do with more lnbs and dishes.

any help will be greatly appreciated.

thanks a lot :)