is it true that the clifford rs3 cannot have more than one transmitter programmed at the same time? i have one, but i want to get one more, but they told me i can't because the frequency is too strong.

if i can't program more than one transmitter with lcd pager, is there anyway i program a clifford matrix remote (those that doesn't have the lcd)? i'm asking cause i really need one more remote, but doesn't matter if the second one has a lcd/pager or not. as long as i have one more remote to use. thanks!