Sounds like something isn't working right. Barus does take Renoults sword after he talks to you at the end of the starting sequence, just as he sends you to Weynon Priory.
Honestly, this sounds like you've got something not going right, and I don't have a solution. Sorry.
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I hate the mice from Bagpuss. Never trust rodents with DIY skills.
"We will fix it, we will fix, we will stick it with glue, glue, glue, we will stickle it, every little bit of it, we will fix it like new, new new."
::SQUISH::
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