perth mint running low or not?

Some folks have been suggesting that the Perth Mint website is an indicator of supply.

Using the website, silver “bars remaining” comes up with

94 x 1kg bars
92 x 100oz bars
813 x 10oz bars

While gold for example
239 10oz gold bar remain.etc

I am not sure you can make assumptions based on how many bars are for sale because you don’t know how much of the bullion they are able to supply is released to website sales.

What I did find interesting was the 100oz silver bars I bought took 21 days from order to despatch. When I phoned them they said they were... out of 100oz bars. I waited, and waited. Most unusual.