I’m not seeing that Product Classification on these Vendor Program-created PDPs that you’ve linked here; all of them that I find to be active Catalog Listings (the Blue version, ASIN B004C23AW, yields a dreaded dog page) are categorized in the same Browse Tree Node: Toys & Games›Learning & Education›Science Kits & Toys - which is of course how they should be classified in Amazon’s Browse Tree structure.
There is nothing existent on any of the currently-available Vendor-created PDPs that could possibly run afoul of FIFRA’s requirements, and each live ASIN’s Offer-Listing page sports Offers from multiple sellers.
I am unable to find a cached version of B004C23AW, so it is possible that there is something that the FIFRA-compliance Amabot detected in your Offer upon that particular Catalog Listing ASIN that is not in compliance - but I strongly suspect, from the available evidence (I’d have to examine your applicable CLRs, or your MWS API query results for applicable reports, to know for sure) that SeSu is yet again incorrect (no surprise, sadly) in telling you that these are goods requiring Selling Application Approval for the Pesticides and Pesticide Device Sub-category (like the FIFRA-compliance Amabot itself - and many another automated mechanism that Amazon employs - SSRs tend to be poorly-targeted - “bug” alone could well be all that ill-trained, off-shored, & out-sourced SSRs are basing such an assertion upon).
I agree with our friends Lake & GenGood’s take upon this situation: at this point, it’s time to act like an electron, and follow the path of least resistance in gaining approval to make Offers in the P & PD Sub-category by passing the Seller University test.
If that does not suffice to restore your Offers upon these Catalog Listing ASINs, please let me know - having had some little experience in successfully jumping through the P & PD hoops, I may be able to offer further advice.