What to do bout severe undercutters and TSM? And other questions

Running TSM its a great addon after some tweaking.

I have some questions, one is not necessarily TSM related but the others are.

I'm a leather worker so I'm using TSM to restock 2-3 of each item I want and undercut people during the initial post and cancelling after. I believe it's working correctly because its not posting below crafting cost which is good...except people are selling the item at 1/4 its value. So, in order to undercut them I would also have to take a loss which I wouldn't do and my TSM isn't setup to do anyways. What should I do about this? Just keep the item up and wait for the cheaper ones to sell out and avoid making this item in the future? There's quite a few up, maybe 6 much cheaper ones ahead of mine so mine wont sell for a bit...maybe they were just training the skill and dumping?

In terms of the actual restock and crafting part, TSM seems to default go to the lowest rank which in theory would be the cheaper version of the material but on my server anyways sometimes its the most expensive and the better quality one is cheaper. Its really the end of the world because I can either manually buy the missing parts separately or adjust the optional reagents manually but it would be nice to adjust material rank so its automated. This also could be affecting what it decides to craft/report.

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Some of my posts are listed as the same price as someone but they are higher up on the list so I assume they are first in line if someone where to buy even though we have the same price. Is this true? And if so how do I fix it? I tried setting canceling repost threshold to both 0c, 1c and -1c but it didn't seem to want to cancel.

Thanks for the help in advance