Yes, this behavior is normal. (PAL composite on NTSC monitor, and vice versa). Keep an eye out for the Indivision AGA 1200 which will let you use a regular PC monitor with no issues. There are also a few (very few) modern monitors that work with a simple 23-pin-15-pin VGA adapter - the Dell SR2320L is one of them.
Brand new 030 accelerators are also available now - grab one while you can.
