no it isn't normal.

I'm intrigued how a doctor even suggested and then performed an ablasion after you had a hysterectomy.
sounds like someone isn't givng you the full story.

small amounts of bleeding are common post hyst.
especially if you have your cervix (what they don't tell you is that as well as the cervix they leave a small "pocket" of uterus.
This often contains endometrium (uterus lining) that is sensitive to your homones still and often produces a monthly bleed - but it should be light (spotting) due to the limited amount of tissue.

full period style bleeding is not right and should most definately be investigated.

before commiting to further surgury I, personally, would suggest that you definately get a second opinion.

I've been in the position of having been told I had had a hyst and to then have continued monthly cycles post operatively.

My case has turned out to be a lot more complex than I or anyone could ever have imagined.
I am now getting answers (2 1/2 years after the fact) from a different hospital.

In a best case scenario (for your symptoms) you would have been left with a larger than typical "pocket" above your cervix, which contains endo tissue and that your ovaries are not producing a correct balance of hormones.
which should then hopefully be treatable with progesterone (in some form).

I'm glad your hubby is with you on this.
Before getting an attorney, get a second opinion. If you are indeed in the best case scenario as suggested above, then there isn't much likely hood of getting a law suit off the ground.

However, if the second opinion reveals anything else, then you may well have a case against the original doctors performing the surgury and giving the post operative care.

Let us know what you decide and the outcome if you feel comfortable to do so.