I have not noticed any difference based upon orals vs oils. However, to be fair, many of my orders are mixed with both type of products.
Regarding signature, most of my packs from intl have required signature for the past couple years -- it is nothing strange and no problem.
Often, I am simply not present at home when it is delivered so a notice is left at my door and I go to teh post office to pick up the pack when I have time. I have never even been asked for ID; I just give teh noptice that was left and the staff retrieves my pack. I sign and it is done.
Logically, it is actaully a much less chance of issue by me going to pick up teh pack because consider the reality of the fact the system has no way to know if or when I will go get it -- by this I mean, maybe I never even go, they can not have a sting team just waiting indefinately at the post office to get me just in case I might come in to pick up a few hundred bucks of AAS.
Finally, if I have not yet opened the pack (I NEVER open the pack for a few days and I write on it "not ours, Return to Post" -- when I do open it I am usually already at the place, not my home residence, where I keep these items), I do still have plausible deniability regarding the contents (in the rare -- not ever going to happen for small personal orders -- event LE ever questioned me, I simply say nothing and ask to speak to my attorney. I explain to the attorney that I simply had a notice for a pack, I did not order any of this but I do order items from amazon and other online stores often so it is common for me to hace packs arriving, so I went to pick up the pack as I would for anything addressed to me).