Yes, this is normal but usually not on items under $20.00. This is hit and miss. I bought a cutting mat for $85.00 and no extra charge. I've bought a lot of cotton on line and so far, touch wood, I have not been charged taxes or surcharge. - We're talking up to $150.00
The shipping seems really high. Any time I order anything from the States, I have it sent regular mail and I usually get in 2-3 weeks. Most vendors will use the type of envelope that you can get up to 7 yards of fabric for $12.00.