Accrued interest adjustment of the amortization (poduct cat. 550)

Hello, gurus!

While trying to post amortization amount for interest rate instrument (product category 550), I faced the problem: system makes no adjustment of the amortization by the amount of accrued interest (using cash flow method in accordance with IAS39). I noticed that this possibility is present for securities.

My 1^st question is why only securities?

The 2^nd question is how to make adjustment postings to post accrued interest separately from the principal debt value. Otherwise I have to refuse using TPM44 to avoid duplicating of the accrued interest. It seems queer to me.

Thanks for any answers,

Alex