I noticed I was no longer signed in to the website.
I tried to sign in using google password manager.
(simple click to add my username and password)
However, I noticed that each time I tried this my username changed from JonC001 to Joncoo1. Why would that be?
I could not sign in, and this was only minutes ago.

I tried again with a refresh of the store page and could not even get the link to sign in.
Suddenly, I found I had access again via the forum page.
So, maybe good.

Why would the sign in page (website) change my username when trying to sign in?
(google puts in JonC001 and it changes to JonCoo1)

Maybe try to clear your browser cookies and cache

For some unknown reason I am now with a poor internet connection, though I have made no changes to anything.
Some days ago, my internet connection failed almost constantly, and I thought I would need to do some things to stop payments.
My connection got better, but is definitely not good.
I sometimes lose the connection while doing something on the internet.
I am using Facebook, and I realize (now) that I can use that to determine whether or not I have an internet connection. (it actually says I am offline at times)

Because of this I have needed to sign into istripper, though I do not know why just this website.
Pre-emptive: I sometimes turn off the external modem, and turn it back on some time later. This gives me a fresh connection.

I noticed recently, when this happens and I need to sign into istripper, it definitely looks like 'JonCoo1' but somehow still gets me signed in.
Maybe this is a false change? I definitely see JonCoo1 instead of JonC001 (which is quite different) and cannot change that. Signing in does work though.

At some point in time you must have accidentally typed the oo instead of the 00
they are very close on the keyboard, and it's a very common mistake.
Your Browser saved that as an autofill...

you can see if that is the case, by typing in Jon and then the down arrow key
you can then cycle through the list of autofill results.