BRIO’s manufacturing quality has historically been pretty high (including after production moved to China), so it’s always noteworthy when products fall a bit short. Take, for example, these large double curve tracks from the late 1990’s:

As you can see the male connectors were drilled off center. This, of course, prevents a proper fit.

I have five pieces of EE track with this issue. They all came from the #33172 Raceway Set which includes a dozen pieces of EE, so they were probably part of the same production run.

Double track was never very popular. It was expensive for what you got and relatively inflexible in a layout unless you had a lot of it. The Raceway Set was one way for BRIO to clear out its excess stock of unsold track, which also made it a cost effective way of getting it if that’s what you wanted. Unless, of course, something like this popped up!