Products not going into inventory

Hi everyone,

I’m relatively new to FBA, which I use to sell second hand books. I’m having a few issues that I can’t get my head around.

1) seemingly randomly, sometimes a product I list just never turns up in my inventory. I go through the process as normal and there are no issues or red flags. I list as FBA and expect it to arrive in my inventory in about 15 minutes, but it doesn’t. So far, this has effected about 5% of my stock. I’ve tried relisting it to no avail. I’ve checked my drafts and incomplete listings – nothing. What’s going on here?

2) as of a few days ago, every listing I submit has a big red “offer” label, prompting me to add photos of an item already listed on Amazon. This didn’t happen before, and isn’t causing an obvious issue to adding inventory, but I don’t understand the purpose of this, nor how to deactivate it. I’m not offering a special offer here, and I worry how that’s being conveyed to customers.

Any insight would be great. I’m slowly realizing quite how bug riddled Amazon FBA is.