[FIXED] Certain seeds can not be purchased in build mode (level 10)

I was maxed out prior to Seasons. I didn't use cheats, I  did gardening the normal way.

I added an NPC sim to my household and discovered he had level 10 gardening skill (Cooper Barrow, maybe he's a pre-built npc, but I didn't know at the time). He could buy all seed packets from the computer or planters, but I could not buy them from build mode. 

Once another sim reached the appropriate levels, the seed packets unlocked and I could buy all of them from build/buy mode. This is base game (+RG and freebies), no mods or cc every used. It appears that whatever unlocks the household buy ability needs to have the skill levels unlocked through gameplay (after the seasons patch?), at least that was the case in my game.