No. The only document I have signed is the aforementioned "Handbook Acknowledgement." My concern is that there's a nefarious double-standard here in which they

No. The only document I have signed is the aforementioned "Handbook Acknowledgement." My concern is that there's a nefarious double-standard here in which they can say explicitly "this is not a contract" but if it were to go to court then legally it could be considered a de-facto contract since it has a signature.