How come Sauron wasn't able to detect Sam in the last chapter of The Two Towers? I'm pretty sure he wore it longer than Frodo in Amon Hen, and Frodo was detected in the latter, was he not? Plus, Sam didn't only wear it for several minutes, he wore it in Mordor... is there any reason why Sauron didn't spot him ? Even if there was something happenening elsewhere, didn't he detect the presence of the ring as soon as Frodo put it on while inside Mountain Doom? And this was while a battle was being fought in his front door, so just how the hell did he not detect Sam?
When Frodo put on the One Ring, both the Nazgul and Sauron himself found Frodo. However when Bilbo had the ring and possibly used it many times, Sauron sought Gollum to get a hint on where to look for the ring and send the Nazgul after it.   Sauron sought Gollum before Bilbo wore the ring at his birthday party, slightly after that time, he was very effective at locating Frodo when Frodo put on the ring. So I guess it's not a matter of Sauron gaining any extra powers with time.  Also Bilbo seemed to use the ring without it bothering him at any point, unlike Frodo who seemed to be very troubled when using the ring. How is that possible?
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