Ah, yes! See my other post to answer a bunch of this.
"A really long player item name....!" is the default error message when something was "created" but we can't actually get it yet. Originally there were more, but now it's just two sets of crafting plans you can see on the Mobile version (that we think are for original weapons, since there is a third on the Isle that does work and has plans for the original hammer) and 8 or the sea flower clamshells in the Lagoon (the other 4 give regular sea flowers).
I forgot to include that most of the weapons have level requirements. Hence the need to be able to go back to an original weapon if you craft one that you can't use yet.
I forgot to include that you can click on boxes and barrels in some locations to sometimes get free items! Mainly: No Man's Landing (common), Raicing Pits (uncommon), Northern Slurries (rare), Lagoon (uncommon), and Fogstone Mines/Tunnels/Depths/Caverns (uncommon & rare).
I'm not sure about the teleporting problem. You could try closing the chat window. It's possible you have problems if you haven't "activated" your player account yet under the new format, but that shouldn't prevent you from teleporting.
Sadly, not all of the items you listed are available anywhere yet, but some of them are - keep exploring!