It is impossible to tell if anything here is contrary to law without knowing what is in the will. One scenario is that Grandmother willed the property to all six biological grandchildren and excluded some number of non-biological grandchildren. The property is to be divided equally between the grandchildren, and nothing goes to her children. Someone was named executor of the estate, let's say your mother. The parents have permission to reside in the house, rent-free. In that case, Mother files paperwork in the county courthouse and is authorized to distribute the assets of the estate. This could involve selling the property and splitting the cash equally, but it could also involve handing over equivalent cash to the grandchildren (from Mother's personal cash). I assume that the estate was not in a trust.
You can get a copy of the will from the county courthouse, because it will have been filed there as part of the probate process (should have been): copies are 50 cent per page. At some point, you will get some paperwork that spells out the details of the distribution. One option is that all interested parties
either sign a waiver of accounting, or else acknowledge having gotten their share of the estate. You will get a notice about a hearing to close probate, and you may object at the hearing if you contest the distribution of assets. You can request notice of all court proceedings by filing a request with the court (cctually, I mean your attorney would do this for you).
One obvious concern is whether the assumed $10,000 share is the correct amount. Obviously, actually selling and dividing by 6 is one way to get that figure. If the market value of the property is $100,000 and there are no debts that the estate must pay, $10,000 each is a lowball figure, and could motivate hiring an attorney.
Another scenario is that somebody is just doing things without paying attention to legal formalities. For example, the cookie jar cash might just have gone into somebody's pocket. Bank accounts, savings bonds and real estate can't be accessed / transferred without filing the will and petitioning for letters of testamentary (etc.), which involves the courts, which makes it difficult to do something sneaky. It is not legal to deny you your inheritance, but it is legal to keep you in the dark (not provide you with a coy of the will). It is also not required that settling up with all interested parties be done at the same time.
Because you can lose rights if you miss deadlines, you need to get an attorney who knows about the deadlines and can make the correct legal noises if someone is doing something illegal. The legal system doesn't actively protect your interests, it provides you a level playing field for you to assert your legal rights, if you follow the procedural rules.
