Salesforce sync only working sometimes and some Pre-registered leads are marked as Invited in Salesforce

[RachWalker]

We are experiencing several issues when it comes to the Marketo/SFDC sync.

First off, most of my team's programs will only partially sync and the statuses never match up in Salesforce. At first, we thought it was just a delay, but days will pass and nothing changes. We then have to run a smart campaign to force sync, but this is a super manual process to do for dozens of campaigns.

Secondly, for most of our programs, Marketo program members that have the pre-registered status should be showing up in Salesforce as pre-registered. Instead, they have been entering Salesforce as Invited and only sometimes some of them update to pre-registered. Why is this?

Any insight is appreciated.

[cookiemonstersa]

Can you share a screenshot of your program in marketo so we can see the statuses listed? 
Same with the statuses in SFDC?

Silly question but are you linking the SFDC campaign to the marketo program directly via the program summary tab?