Since I installed the plug-in the problem was always there having to manually Import every week.
However the past months it takes me about 2-3 hous of continuously clicking import to upload 2 latest posts/week.
Any advice?
The post sync issues will be looked at soon, but its a rather advanced feature and it will take some time. For the time being, try to use the workarounds that are given for these. Ie, turning off post sync at post sync settings, disconnecting your site from Patreon, reconnecting your site, then turning on the post sync.