Dave Smith Instruments SYNTHESIZERS

I'm a newbie but did already do a search to try to find help on this. First I'll explain the setup for my question. I selected Program 128 bank 1 which shows "Basic Program" and I believe is essentially an almost blank slate to work with. I am using the Sequencer on my MEK and set the destination for sequence 1 to OscAllFreq. Then set some of the steps for example 1,2,3 and 4 to any note. Then I set step 5 to "Reset". I also set under Misc params the "Trigger Type" to "Key GatesSeqOnce". If I play a note on the keyboard it will step through the steps 1 through 4 but then it will play step 1 again and then stop. My question is why would it do this? I thought that it would play steps 1 through 4 and then stop. Thanks in advance for your patience and help.