I think you may have to relearn the codes back into the buttons.

What is probably happening is any codes you learned previously have long repeats, they are not clean codes. Examine them in Tonto, and very easily you will see the repeat waveform. Either edit them manually, or re learn the codes, remembering to only use the quickest press of the original remote, consistant with producing a signal.

A good way to do this is to have the original pointing slightly towards the equipment while learning.

If that does not work, then it could be this RC5 code type problem found by Magnus earlier in the thread, or it could the same prob reported by other AXIM users.