[Sirtel]

Such issues are why I sideload everything and never sync. No problems with covers or anything else.

As to the formatting issues, there are many ways to fix those; one of them is to sideload the books as kepubs, others are editing the formatting and patching the Kobo.

Is there a reason you don't connect your Kobo to Calibre? For me, connecting to Calibre was the main reason I bought a Kobo in the first place, given how easy it is to manage metadata and collections on a Kobo automatically via Calibre.