New TARTINE SD Bread Baker

1.  I'm maintaining a 60% Hydration Starter.  I Accidentally FED my starter 50g of warm water & 60 g of each of the flours, ...INSTEAD of 25 g water & 25g of both flours.  What should I expect?  Will it need feeding in the same 24-48 hr time frame, or will it not need feeding for 24 hrs longer?  Or?

2.  My Stretch & Pull is very thick & stiff to handle.  Is this normal?  I've only done 2 stretch/pulls & I am lifting it out of the bowl trying to stretch it with Both Hands!  Is this normal?

3.  Can I use a pyrex baking dish for baking?  I don't have a small cast iron enameled dutch oven, ...yet.  What would the outcome be?  Downsides?

PLEASE 🙏 ADVISE.