A couple things based on my three years experience using SWG PVs on LL, Alaska, Harman and Keystoker stoves.
1. Remove the manual damper in the PV if it is still installed, just collect fly ash and causes an issue if partially closed.
2. measure your draft, didn't see any actual readings, then measure your over fire draft by drilling a small hole in the front of the stove between the two doors. If the pipe draft is -.04" WC then the over fire draft should be -.02" ofr more. If you don't achieve this then use aluminum tape to partially cover the fan inlets on the combustion fans.
Also one observation, with the baro mounted at an angle the weight is no longer accurate, so just use the manometer to adjust the draft and forget where the weight is. If for some reason you can't achieve -.04" WC draft in the flue ppe then you need to check and make sure the rheostat on the PV is working properly, try plugging the PV into the wall directly and see if the draft increases.
Also does yours setup have a WM01 PV safety switch, if not shut it down and get one installed immediately. I know all LL stoves come with a CO detector, make sure you have one by the stove and several outside your sleeping areas.