DaVinci front derailer issues
My wife and I just bought a DaVinci Grand Venture about 2 months ago. We ride it about once a week. I am an avid recreational cyclist, and have been riding road bikes for over 20 years. The problem I am having is shifting the front derailer. It seems like sometimes it needs 2 clicks to go from the big chainring to the middle one, and then one click to go back up to the big chainring. I'm having the most trouble getting it from the smallest chainring to the middle chainring. Sometimes it won't get there even with 2 clicks, and then with a 3rd click it jumps all the way up to the biggest chainring.
I've fooled around with the shifting with the bike up on a work stand. I can see the front derailer uses more than 3 clicks to travel between the various chainrings, but is there some system for shifting between the 3 chainrings? So far it seems pretty random, and I end up doing a lot of over shifting and then adjustment clicks.
Any advice would be greatly appreciated.