Adobe Target Collection missing and misaligned feed attributes

[WdBruin]

I've created a new Google product feed and the correct number of records were ingested with clear mappings of columns/product attributes, but when I try to create a Collection the correct name and pageUrl values show, but all the other attributes (id, thumbnail) are wrong (from other feed products) or doesn't show up at all (mobile_link, contentType). 

Any idea why these product columns are not showing at all or there are mismatching with other feed product attributes (wrong thumbnails showing) in my new Collection?