Rose of Sharon Pattern instruction Question RE DC in same st as last leg of

I'm crocheting the rose of Sharon tunic but having trouble decreasing as I'm not understanding the following:
beginning in same st work dc2tog-skip1, *dc in same st as last leg of dc2tog-skip 1, beginning in same st work dc2tog-skip1; repeat from *
I've figured out the dc2tog-skip1 but do not seem to decrease because I don't understand the "dc in same st as last leg of dc2tog-skip1". Help please. Thank you!

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