Welcome to the board!

About your questions:

1. Did you blow all the air out of your torch before you refilled it? And if you got cheaper quality refill fluid, then that might contribute to the plug.

2. Most guys on the board will tell you 62-65 is optimal. Most of us use something called "Heartfelt Beads" to control it at 65. Especially in the summer months - you don't want it going toward 70 or too far over 70%RH b/c the temperature will probably be above 70.

Stick around, pull up a chair and light a stick.